2021 Ram 3500 Drivetrain Parts: OEM & Replacement (143 Parts)

Q: How many drivetrain parts fit the 2021 Ram 3500?

Our catalog currently lists 143 drivetrain parts for the 2021 Ram 3500 across 44 subcategories and 22 brands, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each part is matched to the engine(s) it fits.

Q: Do drivetrain parts differ between 2021 Ram 3500 engines?

Some do. 123 parts fit every engine; the other 20 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.

Q: What are the signs of drivetrain problems on a 2021 Ram 3500?

Common symptoms include clicking in tight turns, a clunk when shifting between drive and reverse, vibration that builds with speed, or gear oil on the inside of a wheel. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.

Q: What should I replace at the same time?

Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.

Q: What do the market flags (US, CA, MX) on each part mean?

They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Ram 3500 was originally sold in the US, the safest choice is a part marked for the US market.

Q: How do I make sure a part fits my 2021 Ram 3500?

First match the engine — each row shows which engine(s) the part fits. Then a torn CV boot caught early is a cheap boot kit; caught late it is a whole axle — inspect before deciding which to buy. The notes column carries position and trim qualifiers where they apply.

143 Drivetrain parts are listed for the 2021 Ram 3500, in 44 part types, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each one has a brand, a manufacturer part number and notes that say where it fits.

On the 2021 Ram 3500, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 36 parts of the 143 listed are Universal Joint (15 parts), Drive Shaft (14 parts) and Differential Carrier (7 parts). The other 41 part types cover the remaining 107 parts.

4WD Actuator

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40116533	🇺🇸 US 🇨🇦 CA	with 9.25 (In) Front AxleElectronic Disconnect	View on Amazon
AAM Fits: all 2021 3500 engines	40250500	🇺🇸 US 🇨🇦 CA		View on Amazon
WELLS Fits: all 2021 3500 engines	1S17741	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the actuators that engage four-wheel drive at the transfer case or axle. Typical signs include a door or range that will not move, or a click with no motion. Confirm the command signal before replacing the actuator — a failed module looks the same.

Axle / Differential Assembly

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 3500 engines	68295849AD	🇺🇸 US 🇨🇦 CA	Fits RearCab Chassis Fitment notes — MOPAR 68295849AD Fits: RearCab Chassis4.44 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Rear AxleRegular Cab Chassis Wheelbase 1HD 4WD or: RearCab Chassis4.44 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Rear AxleRegular Cab Chassis Wheelbase 2HD 4WD or: RearCab Chassis4.44 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Rear AxleCrew Cab Wheelbase 4HD 4WD	View on Amazon
MOPAR Fits: all 2021 3500 engines	68295851AD	🇺🇸 US 🇨🇦 CA	Fits Rear11.50 Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle Fitment notes — MOPAR 68295851AD Fits: Rear11.50 Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleRegular Cab Chassis Wheelbase 1HD 4WD<10,000 LB GVW or: RearCab Chassis4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Rear AxleRegular Cab Chassis Wheelbase 1HD 4WD or: RearCab Chassis4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Rear AxleRegular Cab Chassis Wheelbase 2HD 4WD or: Rear11.50 Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleRegular Cab Chassis Wheelbase 1<10,000 LB GVW or: Rear11.50 Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleCrew Cab Wheelbase 4HD 4WD<10,000 LB GVW or: RearCab Chassis4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Rear AxleCrew Cab Wheelbase 4HD 4WD or: Rear11.50 Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleCrew Cab Wheelbase 4<10,000 LB GVW	View on Amazon
MOPAR Fits: all 2021 3500 engines	68295852AE	🇺🇸 US 🇨🇦 CA	Fits RearCab Chassis Fitment notes — MOPAR 68295852AE Fits: RearCab Chassis3.73 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Rear AxleRegular Cab Chassis Wheelbase 1HD 4WD or: RearCab Chassis3.73 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Rear AxleRegular Cab Chassis Wheelbase 2HD 4WD or: RearCab Chassis3.73 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Rear AxleCrew Cab Wheelbase 4HD 4WD	View on Amazon
MOPAR Fits: all 2021 3500 engines	68295856AE	🇺🇸 US 🇨🇦 CA	Fits RearCab Chassis Fitment notes — MOPAR 68295856AE Fits: RearCab Chassis4.44 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Dual Wheels Rear AxleRegular Cab Chassis Wheelbase 1HD 4WD or: RearCab Chassis4.44 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50 Dual Wheels Rear AxleRegular Cab Chassis Wheelbase 2HD 4WD or: RearCab Chassis4.44 Rear Axle Ratio, Anti-Spin Differential Rear Axle, 11.50" Dual Wheels Rear AxleCrew Cab Wheelbase 4HD 4WD	View on Amazon
MOPAR Fits: all 2021 3500 engines	68298145AD	🇺🇸 US 🇨🇦 CA	Fits Rear11.50 Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear Axle Fitment notes — MOPAR 68298145AD Fits: Rear11.50 Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab8' Box or: Rear11.50 Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionRegular Cab8 Foot Bed or: Rear11.50 Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab Wheelbase 2	View on Amazon

This table covers the Axle / Differential assemblies.

Axle Housing

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 3500 engines	68460121AA	🇺🇸 US 🇨🇦 CA	Fits Rear12.0" Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear Axle Fitment notes — MOPAR 68460121AA Fits: Rear12.0" Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab8' Box or: Rear12.0" Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionRegular Cab, 8 Foot Bed or: Rear12.0" Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab Wheelbase 2	View on Amazon
MOPAR Fits: all 2021 3500 engines	68460122AA	🇺🇸 US 🇨🇦 CA	Fits Rear226MM Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle Fitment notes — MOPAR 68460122AA Fits: Rear226MM Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionMega CabHD 4WD or: Rear226MM Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionMega CabHD 4WD or: Rear226MM Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab8' BoxHD 4WD or: Rear226MM Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab8' BoxHD 4WD or: Rear226mm Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionRegular Cab, 8 Foot BedHD 4WD or: Rear226mm Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionRegular Cab, 8 Foot BedHD 4WD or: Rear226mm Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab Wheelbase 2H	View on Amazon
MOPAR Fits: all 2021 3500 engines	68460123AB	🇺🇸 US 🇨🇦 CA	Fits Rear226MM Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle, Auto Level Rear Air Suspension Fitment notes — MOPAR 68460123AB Fits: Rear226MM Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle, Auto Level Rear Air SuspensionMega CabHD 4WD or: Rear226MM Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear Axle, Auto Level Rear Air SuspensionMega CabHD 4WD or: Rear226MM Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle, Auto Level Rear Air SuspensionCrew Cab8' BoxHD 4WD or: Rear226MM Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear Axle, Auto Level Rear Air SuspensionCrew Cab8' BoxHD 4WD or: Rear226mm Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear Axle, Auto Level Rear Air SuspensionRegular Cab, 8 Foot BedHD 4WD or: Rear226mm Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle, Auto Level Rear Air SuspensionRegular Cab, 8 Foot BedHD 4WD or: Rear226mm Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle, Auto Level Rear Air SuspensionCrew Cab Wheelbase 2HD 4WD or: Rear226mm Rear Axle, 3.73	View on Amazon
MOPAR Fits: all 2021 3500 engines	68460124AA	🇺🇸 US 🇨🇦 CA	Fits Rear226mm Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear Axle Fitment notes — MOPAR 68460124AA Fits: Rear226mm Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab8' Box or: Rear226mm Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab8' Box or: Rear226mm Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionRegular Cab, 8 Foot Bed or: Rear226mm Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionRegular Cab, 8 Foot Bed or: Rear226mm Rear Axle, 4.10 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab Wheelbase 2 or: Rear226mm Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab Wheelbase 2	View on Amazon
MOPAR Fits: all 2021 3500 engines	68460125AA	🇺🇸 US 🇨🇦 CA	Fits Rear12.0" Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear Axle Fitment notes — MOPAR 68460125AA Fits: Rear12.0" Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionMega CabHD 4WD or: Rear12.0" Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab8' BoxHD 4WD or: Rear12.0" Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionRegular Cab, 8 Foot BedHD 4WD or: Rear12.0" Rear Axle, 3.73 Rear Axle Ratio, Anti-Spin Differential Rear AxleExc. Auto Level Rear Air SuspensionCrew Cab Wheelbase 2HD 4WD	View on Amazon

This table covers the Axle housings.

Axle Shaft

Brand	Part Number	Markets	Notes	Buy
AAM Popular Fits: all 2021 3500 engines	40183413K	🇺🇸 US 🇨🇦 CA	Outer Shaft Length: 684.97 mm Fitment notes — AAM 40183413K Outer Shaft Length: 684.97 mm Front Left4WDwith 9.25 (In) Front Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40104193K	🇺🇸 US 🇨🇦 CA	Kit Includes Axle Nut Fitment notes — AAM 40104193K Kit Includes Axle Nut Front Leftwith 9.25 (In) Front Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40104194K	🇺🇸 US 🇨🇦 CA	Kit Includes Axle Nut Fitment notes — AAM 40104194K Kit Includes Axle Nut Front Rightwith 9.25 (In) Front Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40192275	🇺🇸 US 🇨🇦 CA	Fits Cab & Chassis or Crew Cab Pickup or Standard Cab Pickup1014.8 (mm) Length Fitment notes — AAM 40192275 Fits: Cab & Chassis or Crew Cab Pickup or Standard Cab Pickup1014.8 (mm) Lengthwith Dual Rear Wheels (DRW)with 30 Splineswith 12.0 (In) Rear Axl or: Crew Cab Pickup or Extended Crew Cab Pickup or Standard Cab Pickup1014.8 (mm) Lengthwith Dual Rear Wheels (DRW)with 11.5 (In) Rear Axlewith 30 Splines	View on Amazon
AAM Fits: all 2021 3500 engines	40192276	🇺🇸 US 🇨🇦 CA	Fits 928 (mm) Lengthwith 11.5 (In) Rear Axle Fitment notes — AAM 40192276 Fits: 928 (mm) Lengthwith 11.5 (In) Rear Axlewith 30 Splineswith Single Rear Wheels (SRW) or: 928.8 (mm) Lengthwith 30 Splineswith 12.0 (In) Rear Axlewith Single Rear Wheels (SRW)	View on Amazon
AAM Fits: all 2021 3500 engines	40192277	🇺🇸 US 🇨🇦 CA	Fits Cab & Chassis962.5 (mm) Length Fitment notes — AAM 40192277 Fits: Cab & Chassis962.5 (mm) Lengthwith Dual Rear Wheels (DRW)with 30 Splineswith 11.5 (In) Rear Axl or: Cab & Chassis962.5 (mm) Lengthwith Dual Rear Wheels (DRW)with 30 Teethwith 12.0 (In) Rear Axle	View on Amazon

This table covers the Axle shafts.

Axle Shaft Bearing

Brand	Part Number	Markets	Notes	Buy
MOTIVE GEAR Fits: all 2021 3500 engines	KITGM115LATE	🇺🇸 US 🇨🇦 CA	Axle Differential Bearing and Seal Kit Fitment notes — MOTIVE GEAR KITGM115LATE Axle Differential Bearing and Seal Kit RearGM 10.5"/11.5"	View on Amazon

This table covers the Axle Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.

Axle Shaft Seal

Brand	Part Number	Markets	Notes	Buy
SKF Popular Fits: all 2021 3500 engines	14474	🇺🇸 US 🇨🇦 CA	Front4WD	View on Amazon
AAM Fits: all 2021 3500 engines	40173290	🇺🇸 US 🇨🇦 CA	Cab & Chassiswith Dual Rear Wheels (DRW) Fitment notes — AAM 40173290 Cab & Chassiswith Dual Rear Wheels (DRW)with 12.0 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40173291	🇺🇸 US 🇨🇦 CA	Fits Rear Outerwith 11.5 (In) Rear Axle Fitment notes — AAM 40173291 Fits: Rear Outerwith 11.5 (In) Rear Axlewith Single Rear Wheels (SRW) or: Rear Outerwith 12 (In) Rear Axlewith Single Rear Wheels (SRW)	View on Amazon
TIMKEN Fits: all 2021 3500 engines	SL260175	🇺🇸 US 🇨🇦 CA	Front4WD	View on Amazon
USA STANDARD GEAR Fits: all 2021 3500 engines	USA30236	🇺🇸 US	Yukon Mighty Seal Fitment notes — USA STANDARD GEAR USA30236 Yukon Mighty Seal Front Inner4WDChrysler 9.25"	View on Amazon

This table covers the seals where an axle shaft exits the housing. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

CV Intermediate Shaft

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2021 3500 engines	630060	🇺🇸 US 🇨🇦 CA	Front Inner4WD	View on Amazon

This table covers the CV Intermediate shafts.

CV Joint Boot

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40196148	🇨🇦 CA	Trans. code AS69RC	View on Amazon

This table covers the boots that keep grease in a CV joint. Typical signs include a split boot, grease flung around the joint, or a click once grit is inside. A boot caught early is a kit. Once the joint has clicked, the joint itself is usually worn.

Differential Bearing Adjuster Nut Lock Bolt

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40181318	🇺🇸 US 🇨🇦 CA	Fits with 11.5 (In) Rear Axl Fitment notes — AAM 40181318 Fits: with 11.5 (In) Rear Axl or: with 12 (In) Rear Axle	View on Amazon

This table covers the Differential Bearing Adjuster Nut Lock bolts.

Differential Carrier

Brand	Part Number	Markets	Notes	Buy
USA STANDARD GEAR Popular Fits: all 2021 3500 engines	USA20151	🇺🇸 US 🇨🇦 CA	Differential Carrier Cases Fitment notes — USA STANDARD GEAR USA20151 Differential Carrier Cases Front4WDChrysler 9.25"StandardLoaded Carrier - includes spider gears	View on Amazon
AAM Fits: all 2021 3500 engines	40089797	🇺🇸 US 🇨🇦 CA	with Pinion and Spider Gearswith 9.25 Front Axle Fitment notes — AAM 40089797 with Pinion and Spider Gearswith 9.25 Front Axlewith Open Differential	View on Amazon
AAM Fits: all 2021 3500 engines	40047279	🇺🇸 US 🇨🇦 CA	with Electronic Differential Lockwith 9.25 (In) Front Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40190199	🇺🇸 US 🇨🇦 CA	with 3.73 To 4.44 Axle Ratiowith 11.5 (In) Rear Axle Fitment notes — AAM 40190199 with 3.73 To 4.44 Axle Ratiowith 11.5 (In) Rear Axlewith Limited Slip Differential	View on Amazon
AAM Fits: all 2021 3500 engines	40193800	🇺🇸 US 🇨🇦 CA	3.73 or 4.10 Gear Ratiowith 12 (In) Rear Axle Fitment notes — AAM 40193800 3.73 or 4.10 Gear Ratiowith 12 (In) Rear Axlewith 14 Bolt Coverwith 30 Spline	View on Amazon
AAM Fits: all 2021 3500 engines	40193801	🇺🇸 US 🇨🇦 CA	with 3.73 Gear Ratiowith 33 Splines Fitment notes — AAM 40193801 with 3.73 Gear Ratiowith 33 Splineswith 12 (In) Rear Axlewith Salisbury Differential	View on Amazon
USA STANDARD GEAR Fits: all 2021 3500 engines	USA12766	🇺🇸 US 🇨🇦 CA	Limited Slip Differential Fitment notes — USA STANDARD GEAR USA12766 Limited Slip Differential Rearwith 11.5 In. Rear Differentialwith Differential	View on Amazon

This table covers the carriers that hold the differential gears in the axle.

Differential Carrier Bearing / Race

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40173671	🇺🇸 US 🇨🇦 CA	with 12.0 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	74067038	🇺🇸 US 🇨🇦 CA	with 12 (In) Rear Axle	View on Amazon

This table covers the bearings and races that support the differential carrier.

Differential Cover

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40013758	🇺🇸 US 🇨🇦 CA	with 14 Bolt Coverwith 11.5 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40087998	🇺🇸 US 🇨🇦 CA	with 9.25 (In) Front Axle	View on Amazon
USA STANDARD GEAR Fits: 6.4L V8	USA11903	🇺🇸 US 🇨🇦 CA	Yukon Hardcore Fitment notes — USA STANDARD GEAR USA11903 Yukon Hardcore Rear	View on Amazon

This table covers the Differential covers.

Differential Cover Bolt

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	4000216910	🇺🇸 US 🇨🇦 CA	Set Fitment notes — AAM 4000216910 Set Fits: with 9.25 (In) Front Axl or: M8 X 1.25 X 22 - 6 PT Flange Hex with Adhesivewith 11.5 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40002169	🇺🇸 US 🇨🇦 CA	Fits with 9.25 (In) Front Axl Fitment notes — AAM 40002169 Fits: with 9.25 (In) Front Axl or: M8 X 1.25 X 22 - 6 PT Flange Hex with Adhesivewith 11.5 (In) Rear Axle	View on Amazon

This table covers the Differential Cover bolts.

Differential Cover Gasket

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40270018	🇺🇸 US 🇨🇦 CA	Fits with 11.5 (In) Rear Axl Fitment notes — AAM 40270018 Fits: with 11.5 (In) Rear Axl or: with 12 (In) Rear Axle	View on Amazon
FEL-PRO Fits: all 2021 3500 engines	RDS55501	🇺🇸 US 🇨🇦 CA	FrontAxle Housing Cover	View on Amazon

This table covers the gaskets that seal the Differential Cover. Typical signs include seepage at the joint, a burnt-oil smell, or a leak that appears only after a long drive. Clean both flanges and torque in the sequence the notes or the manual call for.

Differential Crush Sleeve

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40179724	🇺🇸 US 🇨🇦 CA	with 12 (In) Rear Axle	View on Amazon
USA STANDARD GEAR Fits: all 2021 3500 engines	USA33099	🇺🇸 US	Front4WD Fitment notes — USA STANDARD GEAR USA33099 Front4WDChrysler 9.25"	View on Amazon

This table covers the Differential Crush sleeves.

Differential Fill / Drain Plug

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40007601	🇺🇸 US 🇨🇦 CA	with 11.5 (In) Rear Axle	View on Amazon

This table covers the Differential Fill drain plugs.

Differential Pinion Bearing / Race

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40195031	🇺🇸 US 🇨🇦 CA	Inside Diameter: 57.55 mm Fitment notes — AAM 40195031 Inside Diameter: 57.55 mm Rearpinion Head Bearingwith 12.0 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40265294	🇺🇸 US 🇨🇦 CA	with 11.5 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40265297	🇺🇸 US 🇨🇦 CA	Inside Diameter: 57.55 Fitment notes — AAM 40265297 Inside Diameter: 57.55 Rearpinion Head Bearingwith 12.0 (In) Rear Axle	View on Amazon

This table covers the bearings and races on the differential pinion.

Differential Pinion Flange

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40174043	🇺🇸 US 🇨🇦 CA	with 14 Bolt Coverwith 12 (In) Rear Axle	View on Amazon
MOPAR Fits: all 2021 3500 engines	68450930AC	🇺🇸 US 🇨🇦 CA	Fits Crew Cab Crew Cab8' Box Fitment notes — MOPAR 68450930AC Fits: Crew Cab Crew Cab8' Box8-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Regular Cab, 8 Foot Bed8-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Exc. Dual Rear WheelsCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Mega Cab8-SPD Auto 8HP75-LCV TransmissionHD 4WD Fits: Cummins EngineCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE TransmissionHD 4WD or: Cummins EngineRegular Cab, 8 Foot Bed6 Speed Automatic 68RFE TransmissionHD 4WD or: Cummins EngineDual Rear WheelsMega Cab6 Speed Automatic 68RFE TransmissionHD 4WD or: Cummins EngineExc. Dual Rear WheelsCrew Cab Wheelbase 26 Speed Automatic 68RFE TransmissionHD 4WD or: Cummins EngineExc. Dual Rear WheelsMega Cab6 Speed Automatic 68RFE TransmissionHD 4WD	View on Amazon
MOPAR Fits: all 2021 3500 engines	68533398AA	🇺🇸 US 🇨🇦 CA	Fits Cab ChassisRegular Cab Chassis Wheelbase 1 Fitment notes — MOPAR 68533398AA Fits: Cab ChassisRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS66RC HD TransHD 4WD or: Cab ChassisHeavy Duty HEMI MDS EngineRegular Cab Chassis Wheelbase 18-SPD Auto 8HP75-LCV TransmissionHD 4WD<10,000 LB GVW or: Cab ChassisDual Rear WheelsRear AxleRegular Cab Chassis Wheelbase 26 Speed Auto Aisin AS66RC HD TransHD 4WD or: Cab ChassisDual Rear WheelsRear AxleRegular Cab Chassis Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Cab ChassisRear AxleCrew Cab Wheelbase 46 Speed Auto Aisin AS66RC HD TransHD 4WD or: Cab ChassisRear AxleCrew Cab Wheelbase 48-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Cab ChassisRear AxleRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS66RC HD Trans Fits: Cab ChassisCummins EngineDual Rear Wheels, 3.73 Rear Axle RatioRear AxleCrew Cab Wheelbase 46 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cab ChassisCummins EngineDual Rear Wheels, 3.73 Rear Axle RatioRear AxleRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS69RC HD Trans or: Cab ChassisCummins EngineDual Rear Wheels, 3.73 Rear Axle RatioRear AxleRegular Cab Chassis Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cab ChassisCummins EngineDual Rear Wheels, 3.73 Rear Axle RatioRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cab ChassisCummins EngineExc. Dual Rear WheelsRear AxleCrew Cab Wheelbase 46 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cab ChassisCummins EngineExc. Dual Rear WheelsRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cab ChassisCummins EngineExc. Dual Rear WheelsRear AxleRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS69RC HD Trans	View on Amazon
MOPAR Fits: 6.4L V8	68533399AA	🇺🇸 US 🇨🇦 CA	Fits Cab ChassisRegular Cab Chassis Wheelbase 1 Fitment notes — MOPAR 68533399AA Fits: Cab ChassisRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS66RC HD Trans or: Cab ChassisCrew Cab Wheelbase 46 Speed Auto Aisin AS66RC HD TransmissionHD 4WD or: Cab ChassisHeavy Duty HEMI MDS EngineCrew Cab Wheelbase 48-SPD Auto 8HP75-LCV TransmissionHD 4WD<10,000 LB GVW or: Cab ChassisDual Rear WheelsRegular Cab Chassis Wheelbase 26 Speed Auto Aisin AS66RC HD TransHD 4WD or: Cab ChassisDual Rear WheelsRegular Cab Chassis Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68450961AC	🇺🇸 US 🇨🇦 CA	Fits Cummins engine HO EngineExc. Dual Rear Wheels Fitment notes — MOPAR 68450961AC Fits: Cummins engine HO EngineExc. Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins engine HO EngineDual Rear WheelsCrew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins engine HO EngineExc. Dual Rear WheelsCrew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD	View on Amazon

This table covers the flanges that connect the driveshaft to the differential pinion.

Differential Pinion Nut

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40169206	🇺🇸 US 🇨🇦 CA	Fits with 11.5 (In) Rear AxleDrive Pinion Nutor with 12.0 (In) Rear Axle Fitment notes — AAM 40169206 Fits: with 11.5 (In) Rear AxleDrive Pinion Nutor with 12.0 (In) Rear AxleDrive Pinion Nut	View on Amazon

This table covers the Differential Pinion nuts.

Differential Pinion Repair Sleeve

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	26060977	🇺🇸 US 🇨🇦 CA	Replacement sleevewith 11.5 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	26060975	🇺🇸 US 🇨🇦 CA	FrontSleeve To adapt standard yoke To Use late model triple Lip pinion seal Fitment notes — AAM 26060975 FrontSleeve To adapt standard yoke To Use late model triple Lip pinion sealwith 9.25 (In) Front Axle	View on Amazon

This table covers the wear sleeves used to restore a grooved pinion seal surface.

Differential Pinion Seal

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40173292	🇺🇸 US 🇨🇦 CA	Fits with Dual Rear Wheels (DRW)with 11.5 (In) Rear Axl Fitment notes — AAM 40173292 Fits: with Dual Rear Wheels (DRW)with 11.5 (In) Rear Axl or: with Dual Rear Wheels (DRW)with 12 (In) Rear Axle	View on Amazon
TIMKEN Fits: all 2021 3500 engines	SL260601	🇺🇸 US 🇨🇦 CA	Front	View on Amazon
TIMKEN Fits: all 2021 3500 engines	SL260603	🇺🇸 US 🇨🇦 CA	RearRing Gear 11.50"	View on Amazon

This table covers the seals at the differential pinion yoke. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Differential Rebuild Kit

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	74067032	🇺🇸 US 🇨🇦 CA	with 11.5 (In) Rear Axle	View on Amazon
USA STANDARD GEAR Fits: all 2021 3500 engines	USA12947	🇺🇸 US 🇨🇦 CA	Front4WD Fitment notes — USA STANDARD GEAR USA12947 Front4WDwith AAM 9.25 In. Front Differential	View on Amazon
USA STANDARD GEAR Fits: all 2021 3500 engines	USA12848	🇺🇸 US 🇨🇦 CA	Rear2.267 In. and 1.890 In. Pinion Bearing Journal Diameters Fitment notes — USA STANDARD GEAR USA12848 Rear2.267 In. and 1.890 In. Pinion Bearing Journal Diameterswith AAM 11.5 Rear Differentialwith Differential	View on Amazon

This table covers kits that group the bearings, races and seals for a differential rebuild.

Differential Ring and Pinion

Brand	Part Number	Markets	Notes	Buy
AAM Popular Fits: all 2021 3500 engines	D120410GSK	🇺🇸 US 🇨🇦 CA	with 4.10 Axle Ratiowith 14 Bolt Cover Fitment notes — AAM D120410GSK with 4.10 Axle Ratiowith 14 Bolt Coverwith 12 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	115410GSK	🇺🇸 US 🇨🇦 CA	Rearwith 4.10 Axle Ratio Fitment notes — AAM 115410GSK Rearwith 4.10 Axle Ratiowith 11.5 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	D925444GSK	🇺🇸 US 🇨🇦 CA	Axle Type: 9.25" SalisburyFront Axle Fitment notes — AAM D925444GSK Axle Type: 9.25" SalisburyFront Axle Frontwith 4.44 Axle Ratiowith 9.25 (In) Front Axle	View on Amazon
AAM Fits: all 2021 3500 engines	115373GSK	🇺🇸 US 🇨🇦 CA	Rearwith 3.73 Axle Ratio Fitment notes — AAM 115373GSK Rearwith 3.73 Axle Ratiowith 11.5 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	115444GSK	🇺🇸 US 🇨🇦 CA	Rearwith 4.44 Axle Ratio Fitment notes — AAM 115444GSK Rearwith 4.44 Axle Ratiowith 11.5 (In) Rear Axle	View on Amazon

This table covers the ring-and-pinion gear sets that set the axle ratio.

Differential Ring Gear Bolt

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	14012703	🇺🇸 US 🇨🇦 CA	Thread Diameter: 12 MM Fitment notes — AAM 14012703 Thread Diameter: 12 MM with 9.25 (In) Front Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40022812	🇺🇸 US 🇨🇦 CA	M14 X 1.5 X 38 - 6 PT Hex with Adhesivewith 11.5 (In) Rear Axle	View on Amazon
AAM Fits: all 2021 3500 engines	40064367	🇺🇸 US 🇨🇦 CA	Thread Diameter: 12	View on Amazon

This table covers the Differential Ring Gear bolts.

Differential Seal

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	26064030	🇺🇸 US 🇨🇦 CA	Use with 26060977 sleevewith 11.5 (In) Rear Axle	View on Amazon

This table covers the seals at the Differential. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Differential Spider Gear

Brand	Part Number	Markets	Notes	Buy
USA STANDARD GEAR Fits: all 2021 3500 engines	USA16067	🇺🇸 US	Differential Carrier Gear KitForged Fitment notes — USA STANDARD GEAR USA16067 Differential Carrier Gear KitForged Front Axle4WDChrysler 9.25"Standard Open33 SplineStraight AxleFront Spider Set	View on Amazon

This table covers the Differential Spider gears.

Drive Shaft

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: 6.7L L6 DIESEL Turbocharged	986768	🇺🇸 US 🇨🇦 CA	Length: 109.8" Fitment notes — DORMAN 986768 Length: 109.8" RearRWDCrew Cab Pickup98.3" bed169.0" WheelbaseTrans. code AS69RC	View on Amazon
DORMAN Fits: 6.7L L6 DIESEL Turbocharged	986986	🇺🇸 US 🇨🇦 CA	Length: 89.125" Fitment notes — DORMAN 986986 Length: 89.125" Rear4WDCab & Chassis172.4" WheelbaseTrans. code AS69RC	View on Amazon
DORMAN Fits: 6.7L L6 DIESEL Turbocharged	986947	🇺🇸 US 🇨🇦 CA	Length: 91.875" Fitment notes — DORMAN 986947 Length: 91.875" Rear4WDCrew Cab Pickup98.3" Bed169.0" WheelbaseTrans. code AS69RCwith Dual Rear Wheels (DRW)	View on Amazon
DORMAN Fits: 6.7L L6 DIESEL Turbocharged	966549	🇺🇸 US 🇨🇦 CA	Length: 92.5" Fitment notes — DORMAN 966549 Length: 92.5" Rear4WDCrew Cab Pickup98.3" Bed169.0" WheelbaseTrans. code AS69RCwith Single Rear Wheel (SRW)	View on Amazon
MOPAR Fits: 6.4L V8	68305348AC	🇺🇸 US 🇨🇦 CA	2-Piece Fitment notes — MOPAR 68305348AC 2-Piece RearCab ChassisHeavy Duty HEMI MDS EngineDrive Shaft, RearCrew Cab Wheelbase 48-SPD Auto 8HP75-LCV Transmission<10,000 LB GVW	View on Amazon
MOPAR Fits: 6.4L V8	68305350AC	🇺🇸 US 🇨🇦 CA	2-Piece Fitment notes — MOPAR 68305350AC 2-Piece RearCab ChassisDrive Shaft, RearDual Rear WheelsRegular Cab Chassis Wheelbase 28-SPD Auto 8HP75-LCV Transmission	View on Amazon
MOPAR Fits: 6.4L V8	68305350AD	🇺🇸 US 🇨🇦 CA	2-Piece Fitment notes — MOPAR 68305350AD 2-Piece RearCab ChassisDrive Shaft, RearDual Rear WheelsRegular Cab Chassis Wheelbase 28-SPD Auto 8HP75-LCV Transmission	View on Amazon
MOPAR Fits: 6.4L V8	68305352AD	🇺🇸 US 🇨🇦 CA	2-Piece Fitment notes — MOPAR 68305352AD 2-Piece RearCab ChassisDrive Shaft, RearRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS66RC HD Trans	View on Amazon
MOPAR Fits: 6.4L V8	68305353AD	🇺🇸 US 🇨🇦 CA	2-Piece Fitment notes — MOPAR 68305353AD 2-Piece RearCab ChassisDrive Shaft, RearCrew Cab Wheelbase 46 Speed Auto Aisin AS66RC HD Trans	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68305624AE	🇺🇸 US 🇨🇦 CA	Fits Cab ChassisDrive Shaft, Front Fitment notes — MOPAR 68305624AE Fits: Cab ChassisDrive Shaft, FrontRegular Cab Chassis Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Drive Shaft, FrontCrew Cab Wheelbase 26 Speed Automatic 68RFE TransmissionHD 4WD or: Drive Shaft, FrontCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Drive Shaft, FrontCrew Cab8' Box6 Speed Automatic 68RFE TransmissionHD 4WD or: Drive Shaft, FrontCrew Cab8' Box8-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Drive Shaft, FrontMega Cab6 Speed Automatic 68RFE TransmissionHD 4WD or: Drive Shaft, FrontMega Cab8-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Drive Shaft, FrontCrew Cab Wheelbase 48-SPD Auto 8HP75-LCV TransmissionHD 4WD<10K Lb. Cab CHASSIS or: Drive Shaft, FrontRegular Cab Chassis Wheelbase 18-SPD Auto 8HP75-LCV TransmissionHD 4WD<10K Lb. Cab CHASSIS or: Drive Shaft, FrontRegular Cab, 8 Foot Bed6 Speed Automatic 68RFE TransmissionHD 4WD or: Drive Shaft, FrontRegular Cab, 8 Foot Bed8-SPD Auto 8HP75-LCV Transmi	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68305643AF	🇺🇸 US 🇨🇦 CA	1-Piece Fitment notes — MOPAR 68305643AF 1-Piece RearCummins EngineDrive Shaft, RearRegular Cab, 8 Foot Bed6 Speed Automatic 68RFE TransmissionHD 4WD	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68305647AE	🇺🇸 US 🇨🇦 CA	1-Piece Fitment notes — MOPAR 68305647AE 1-Piece RearCummins EngineDrive Shaft, RearExc. Dual Rear WheelsCrew Cab Wheelbase 26 Speed Automatic 68RFE TransmissionHD 4WD	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68305649AE	🇺🇸 US 🇨🇦 CA	2-Piece Fitment notes — MOPAR 68305649AE 2-Piece RearCummins EngineDrive Shaft, RearExc. Dual Rear WheelsMega Cab6 Speed Automatic 68RFE TransmissionHD 4WD	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68305650AE	🇺🇸 US 🇨🇦 CA	1-Piece Fitment notes — MOPAR 68305650AE 1-Piece RearCummins EngineDrive Shaft, RearDual Rear WheelsMega Cab6 Speed Automatic 68RFE TransmissionHD 4WD	View on Amazon

This table covers the driveshafts that carry torque from the transmission or transfer case.

Drive Shaft Bolt

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2021 3500 engines	13864	🇺🇸 US 🇨🇦 CA	Fits Rear Fitment notes — DORMAN 13864 Fits: Rear or: Front	View on Amazon

This table covers the Drive Shaft bolts.

Drive Shaft Center Support Bearing

Economy

Brand	Part Number	Markets	Notes	Buy
WESTAR Fits: all 2021 3500 engines	DS6555	🇺🇸 US 🇨🇦 CA		View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
ANCHOR Fits: all 2021 3500 engines	6139	🇺🇸 US 🇨🇦 CA	Rearwith 40mm Inside Diameter Bearing(s) Fitment notes — ANCHOR 6139 Rearwith 40mm Inside Diameter Bearing(s)70mm Centerline Of Bearing To Mounting Facewith 168mm Mounting	View on Amazon
MOPAR Fits: 6.4L V8	68450997AA	🇺🇸 US 🇨🇦 CA	Fits Cab ChassisRegular Cab Chassis Wheelbase 1 Fitment notes — MOPAR 68450997AA Fits: Cab ChassisRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS66RC HD Trans or: Crew Cab Crew Cab8' Box8-SPD Auto 8HP75-LCV Transmission or: Regular Cab8 Foot Bed8-SPD Auto 8HP75-LCV Transmission or: Cab ChassisHeavy Duty HEMI MDS EngineRegular Cab Chassis Wheelbase 18-SPD Auto 8HP75-LCV Transmission<10,000 LB GVW or: Cab ChassisCrew Cab Wheelbase 46 Speed Auto Aisin AS66RC HD TransmissionHD 4WD or: Cab ChassisHeavy Duty HEMI MDS EngineCrew Cab Wheelbase 48-SPD Auto 8HP75-LCV Transmission<10,000 LB GVW or: Cab ChassisHeavy Duty HEMI MDS EngineCrew Cab Wheelbase 48-SPD Auto 8HP75-LCV TransmissionHD 4WD<10,000 LB GVW or: Cab ChassisDual Rear WheelsRegular Cab Chassis Wheelbase 26 Speed Auto Aisin AS66RC HD TransHD 4WD or: Cab ChassisDual Rear WheelsRegular Cab Chassis Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Exc. Dual Rear WheelsCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV Transmission	View on Amazon
MOPAR Fits: 6.7L L6 DIESEL Turbocharged	68451004AA	🇺🇸 US 🇨🇦 CA	Fits Cummins EngineCrew Cab Crew Cab Fitment notes — MOPAR 68451004AA Fits: Cummins EngineCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE TransmissionHD 4WD or: Cummins engine HO EngineDual Rear WheelsCrew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins engine HO EngineExc. Dual Rear WheelsCrew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins EngineExc. Dual Rear WheelsCrew Cab Wheelbase 26 Speed Automatic 68RFE Transmission or: Cummins EngineExc. Dual Rear WheelsMega Cab6 Speed Automatic 68RFE TransmissionHD 4WD	View on Amazon
PIONEER Fits: all 2021 3500 engines	646139	🇺🇸 US 🇨🇦 CA	1.575" BEARING I.D.6.62" MOUNTING	View on Amazon

This table covers the Drive Shaft Center Support bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.

Drive Shaft Seal

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40201742	🇺🇸 US 🇨🇦 CA	Frontwith 9.25 (In) Front Axle	View on Amazon

This table covers the seals at the Drive Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Drive Shaft Slip Yoke

Brand	Part Number	Markets	Notes	Buy
AAM Fits: all 2021 3500 engines	40189966	🇺🇸 US 🇨🇦 CA	Fits Rear Driveshaft At Transfer CaseCrew Cab Pickup or Standard Cab Pickup Fitment notes — AAM 40189966 Fits: Rear Driveshaft At Transfer CaseCrew Cab Pickup or Standard Cab PickupBig Horn or Tradesman or: Rear Driveshaft At Transfer CaseLaramie or Limited	View on Amazon

This table covers the Drive Shaft Slip yokes.

Gear Oil

Brand	Part Number	Markets	Notes	Buy
MOBIL Popular Fits: all 2021 3500 engines	102490	🇺🇸 US 🇨🇦 CA	Synthetic Gear Lube Limited Slip 75W-14 0Mobil 1 Synthetic Gear Lubricant LS 75W-14 0 Fitment notes — MOBIL 102490 Synthetic Gear Lube Limited Slip 75W-14 0Mobil 1 Synthetic Gear Lubricant LS 75W-14 01 Quart Rear DifferentialLimited Slip Rear Differential305 American Axle Banjo Fits: Rear DifferentialEngine Code ETL or Engine Code ETMLimited Slip Rear Differential305 American Axle Banjo or: Rear DifferentialEngine Code ETNLimited Slip Rear Differential305 American Axle with Dual Rear Wheels	View on Amazon
VALVOLINE Popular Fits: all 2021 3500 engines	VV982	🇺🇸 US 🇨🇦 CA	Advanced Full Synthetic SAE 75W-14 0 Gear Oil1 Quart Fitment notes — VALVOLINE VV982 Advanced Full Synthetic SAE 75W-14 0 Gear Oil1 Quart Rear Differential	View on Amazon
IDEMITSU Fits: 6.4L V8	30305075750	🇺🇸 US	75W90 Gear Oil1 Quart Fitment notes — IDEMITSU 30305075750 75W90 Gear Oil1 Quart Fits: Front DifferentialComponent code 275FBI or: Rear DifferentialComponent code 310RBI or: Rear DifferentialBig Horn or Limited Longhorn or Lone StarComponent code 310RBI	View on Amazon
VALVOLINE Fits: all 2021 3500 engines	889787	🇺🇸 US 🇨🇦 CA	Full Synthetic SAE 75W-14 0 Gear Oil1 Quart Flex Fill Fitment notes — VALVOLINE 889787 Full Synthetic SAE 75W-14 0 Gear Oil1 Quart Flex Fill Rear Differential	View on Amazon
VALVOLINE Fits: all 2021 3500 engines	887344	🇺🇸 US 🇨🇦 CA	Advanced Full Synthetic SAE 75W-14 0 Gear Oil1 Gallon Fitment notes — VALVOLINE 887344 Advanced Full Synthetic SAE 75W-14 0 Gear Oil1 Gallon Rear Differential	View on Amazon
VALVOLINE Fits: all 2021 3500 engines	VV981	🇺🇸 US 🇨🇦 CA	Advanced Full Synthetic SAE 75W-14 0 Gear Oil5 Gallon Fitment notes — VALVOLINE VV981 Advanced Full Synthetic SAE 75W-14 0 Gear Oil5 Gallon Rear Differential	View on Amazon

This table covers the gear oils specified for the axle or transfer case. Typical signs include a low-oil lamp, knocking, or oil that has gone thin before the next interval. Match the viscosity and spec in the notes, not just the weight on the bottle.

Transfer Case Assembly

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 3500 engines	68306993AD	🇺🇸 US 🇨🇦 CA	Fits BW 44-47Manual Shift-On-The-Fly Transfer Case, Dual Rear Wheels Fitment notes — MOPAR 68306993AD Fits: BW 44-47Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsRegular Cab, 8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD	View on Amazon
MOPAR Fits: all 2021 3500 engines	68306994AD	🇺🇸 US 🇨🇦 CA	Fits BW 44-46Electric Shift-On-The-Fly Transfer Case, Dual Rear Wheels Fitment notes — MOPAR 68306994AD Fits: BW 44-46Electric Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: BW 44-46Electric Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: BW 44-46Electric Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: BW 44-46Electric Shift-On-The-Fly Transfer Case, Dual Rear WheelsRegular Cab, 8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD	View on Amazon
MOPAR Fits: all 2021 3500 engines	68396129AC	🇺🇸 US 🇨🇦 CA	Fits BW 44-47Manual Shift-On-The-Fly Transfer Case Fitment notes — MOPAR 68396129AC Fits: BW 44-47Manual Shift-On-The-Fly Transfer CaseCrew Cab Crew Cab8' Box6 Speed Automatic 68RFE TransmissionHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseMega Cab6 Speed Automatic 68RFE TransmissionHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseCrew Cab Crew Cab8' Box8-SPD Auto 8HP75-LCV TransmissionHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseMega Cab8-SPD Auto 8HP75-LCV TransmissionHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 18-SPD Auto 8HP75-LCV TransmissionHD 4WD<10K Lb. Cab CHASSIS or: BW 44-47Manual Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 26 Speed Automatic 68RFE TransmissionHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseRegular Cab, 8 Foot Bed6 Speed Automatic 68RFE TransmissionHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfe	View on Amazon
MOPAR Fits: all 2021 3500 engines	68396130AD	🇺🇸 US 🇨🇦 CA	Fits Cab ChassisBW 44-47 Fitment notes — MOPAR 68396130AD Fits: Cab ChassisBW 44-47Manual Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS69RC HD TransHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseExc. Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseExc. Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cab ChassisBW 44-47Manual Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 16 Speed Auto Aisin AS66RC HD TransHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseExc. Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseExc. Dual Rear WheelsRegular Cab, 8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD	View on Amazon
MOPAR Fits: all 2021 3500 engines	68396131AC	🇺🇸 US 🇨🇦 CA	Fits Cab ChassisBW 44-47 Fitment notes — MOPAR 68396131AC Fits: Cab ChassisBW 44-47Manual Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD or: BW 44-47Manual Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 48-SPD Auto 8HP75-LCV TransmissionHD 4WD<10K Lb. Cab Chassis	View on Amazon

This table covers the Transfer Case assemblies.

Transfer Case Control Lever

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 3500 engines	52105551AC	🇺🇸 US 🇨🇦 CA	Fits Manual Shift-on-the-Fly Transfer CaseMega Cab Fitment notes — MOPAR 52105551AC Fits: Manual Shift-on-the-Fly Transfer CaseMega CabHD 4WD or: Cab ChassisManual Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 2HD 4WD or: Manual Shift-On-The-Fly Transfer CaseCrew Cab Crew Cab8' BoxHD 4WD or: Manual Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 1HD 4WD<10K Lb. Cab CHASSIS or: Manual Shift-On-The-Fly Transfer CaseRegular Cab, 8 Foot BedHD 4WD or: Manual Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 2HD 4WD or: Manual Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 4HD 4WD<10K Lb. Cab Chassis	View on Amazon

This table covers the levers that shift the transfer case.

Transfer Case Control Lever Bushing

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2021 3500 engines	14078	🇺🇸 US 🇨🇦 CA	with Shift on the Fly Transfer Case	View on Amazon
SKP Fits: all 2021 3500 engines	SK14078	🇺🇸 US 🇨🇦 CA	with Shift on the Fly Transfer Case	View on Amazon

This table covers the Transfer Case Control Lever bushings. Typical signs include a clunk over bumps, or a torn or walked-out bushing you can see. Press the new bushing square. A cocked bushing will tear in a few thousand miles.

Transfer Case Control Module

Brand	Part Number	Markets	Notes	Buy
DORMAN Fits: all 2021 3500 engines	599099	🇺🇸 US 🇨🇦 CA	Fits 4WDwith Sales Code DK1 (Manual Shift Transfer Case) Fitment notes — DORMAN 599099 Fits: 4WDwith Sales Code DK1 (Manual Shift Transfer Case) or: 4WDwith Sales Code DK3 (Electronic Shift On The Fly Transfer Case)	View on Amazon
MOPAR Fits: all 2021 3500 engines	68250127AC	🇺🇸 US 🇨🇦 CA	Fits Man Shift-On-The-Fly Transfer Case Or Elec Shift-On-The-Fly Transfer CaseMega Cab Fitment notes — MOPAR 68250127AC Fits: Man Shift-On-The-Fly Transfer Case Or Elec Shift-On-The-Fly Transfer CaseMega CabHD 4WD or: Man Shift-On-The-Fly Transfer Case Or Elec Shift-On-The-Fly Transfer CaseRegular Cab8 Foot BedHD 4WD or: MAN Shift-On-The-Fly Transfer Case or Elec Shift-On-The-Fly Transfer CaseCrew Cab Crew Cab8' BoxHD 4WD or: Cab ChassisMAN Shift-On-The-Fly Transfer Case or Elec Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 2HD 4WD or: MAN Shift-On-The-Fly Transfer Case or Elec Shift-On-The-Fly Transfer CaseRegular Cab Chassis Wheelbase 1HD 4WD<10K Lb. Cab CHASSIS or: MAN Shift-On-The-Fly Transfer Case or Elec Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 2HD 4WD or: MAN Shift-On-The-Fly Transfer Case or Elec Shift-On-The-Fly Transfer CaseCrew Cab Wheelbase 4HD 4WD<10K Lb. Cab Chassis	View on Amazon

This table covers the Transfer Case control modules.

Transfer Case Fluid

Dexron

Brand	Part Number	Markets	Notes	Buy
VALVOLINE Fits: all 2021 3500 engines	798153	🇺🇸 US 🇨🇦 CA	Dexron III / Mercon ATF1 Quart Fitment notes — VALVOLINE 798153 Dexron III / Mercon ATF1 Quart 4WD	View on Amazon
VALVOLINE Fits: all 2021 3500 engines	773636	🇺🇸 US 🇨🇦 CA	Dexron III / Mercon ATF1 Gallon Fitment notes — VALVOLINE 773636 Dexron III / Mercon ATF1 Gallon 4WD	View on Amazon
VALVOLINE Fits: all 2021 3500 engines	VV349	🇺🇸 US 🇨🇦 CA	Dexron III / Mercon ATF5 Gallon Pail Fitment notes — VALVOLINE VV349 Dexron III / Mercon ATF5 Gallon Pail 4WD	View on Amazon

Multi-Vehicle

Brand	Part Number	Markets	Notes	Buy
VALVOLINE Fits: all 2021 3500 engines	855459	🇺🇸 US 🇨🇦 CA	Multi-Vehicle Transfer Case Fluid1 Quart Fitment notes — VALVOLINE 855459 Multi-Vehicle Transfer Case Fluid1 Quart 4WD	View on Amazon

This table covers the fluids specified for the transfer case. Typical signs include discolored fluid, a burnt smell, or a level that keeps dropping. Use only the specification in the notes — the tables group grades because they are not interchangeable.

Transfer Case High / Low Clutch

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 3500 engines	68450063AA	🇺🇸 US 🇨🇦 CA	Fits Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab Fitment notes — MOPAR 68450063AA Fits: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsRegular Cab, 8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsRegular Cab, 8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD	View on Amazon

This table covers the Transfer Case High / Low clutches. Typical signs include slip at highway speed, chatter on takeoff, or a pedal that stays low. Resurface or replace the flywheel with the clutch — a heat-checked flywheel wastes the new disc.

Transfer Case Motor

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 3500 engines	68450191AA	🇺🇸 US 🇨🇦 CA	Fits Electric Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab Fitment notes — MOPAR 68450191AA Fits: Electric Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Electric Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Electric Shift-On-The-Fly Transfer Case, Dual Rear WheelsRegular Cab8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Electric Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD	View on Amazon
STANDARD MOTOR PRODUCTS Fits: all 2021 3500 engines	TCM156	🇺🇸 US 🇨🇦 CA		View on Amazon

This table covers the Transfer Case motors. Typical signs include no motion, a squeal, or a motor that only runs on one speed. Confirm power, ground and the control module before replacing the motor.

Transfer Case Output Shaft Bearing

Brand	Part Number	Markets	Notes	Buy
SKF Fits: all 2021 3500 engines	6307J	🇺🇸 US 🇨🇦 CA	Front RearwardBorg Warner Transfer Case	View on Amazon
SKF Fits: all 2021 3500 engines	6208J	🇺🇸 US 🇨🇦 CA	Front ForwardBorg Warner Transfer Case	View on Amazon
SKF Fits: all 2021 3500 engines	6309J	🇺🇸 US 🇨🇦 CA	RearBorg Warner Transfer Case	View on Amazon

This table covers the Transfer Case Output Shaft bearings. Typical signs include a growl that rises with speed, or play in the shaft or hub. Set preload the way the notes specify. A dry or crushed bearing fails quickly.

Transfer Case Output Shaft Seal

Brand	Part Number	Markets	Notes	Buy
SKF Fits: all 2021 3500 engines	18892	🇺🇸 US 🇨🇦 CA	FrontBorg Warner Transfer Case	View on Amazon
SKF Fits: all 2021 3500 engines	22865A	🇺🇸 US 🇨🇦 CA	RearBorg Warner Transfer Case	View on Amazon
WJB / INMOTION PARTS Fits: all 2021 3500 engines	WS22865A	🇺🇸 US 🇨🇦 CA	RearBorg Warner Transfer Case	View on Amazon

This table covers the seals at the Transfer Case Output Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Transfer Case Shift Shaft Seal

Brand	Part Number	Markets	Notes	Buy
NATIONAL Fits: all 2021 3500 engines	330385	🇺🇸 US 🇨🇦 CA	4WDwith Borg-Warner 4448 Transfer Case Fitment notes — NATIONAL 330385 4WDwith Borg-Warner 4448 Transfer Case2 Speed	View on Amazon

This table covers the seals at the Transfer Case Shift Shaft. Typical signs include a wet housing, a drip after sitting, or fluid flung off a rotating shaft. Fix the surface the seal rides on. A new seal on a grooved shaft will leak again.

Transfer Case Sprocket

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 3500 engines	68449235AA	🇺🇸 US 🇨🇦 CA	Fits Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab Fitment notes — MOPAR 68449235AA Fits: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsRegular Cab8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsRegular Cab8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD	View on Amazon
MOPAR Fits: all 2021 3500 engines	68449236AA	🇺🇸 US 🇨🇦 CA	Fits Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab Fitment notes — MOPAR 68449236AA Fits: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsRegular Cab8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Crew Cab8' Box6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsRegular Cab8 Foot Bed6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Elec Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: Manual Shift-On-The-Fly Transfer Case, Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD	View on Amazon

This table covers the Transfer Case sprockets.

Universal Joint

Economy

Brand	Part Number	Markets	Notes	Buy
DANA Fits: all 2021 3500 engines	253212X	🇺🇸 US 🇨🇦 CA	Spicer SelectNon-Greasable Fitment notes — DANA 253212X Spicer SelectNon-Greasable Front Axle At Wheels4WDwith Inside Snap RingsAAM 1555 Series Drive Axlesfor OE#'S 68065428AA, 68065428AB, 68065428AC, 68065428AD, 74081555with AAM Front Axle	View on Amazon

Heavy Duty

Brand	Part Number	Markets	Notes	Buy
MOOG Fits: all 2021 3500 engines	493	🇺🇸 US 🇨🇦 CA	Super StrengthGreasable Fitment notes — MOOG 493 Super StrengthGreasable Front Driveshaft at Front Axle4WD	View on Amazon
MOOG Fits: all 2021 3500 engines	291	🇺🇸 US 🇨🇦 CA	Super StrengthNon-Greasable Fitment notes — MOOG 291 Super StrengthNon-Greasable Fits: Front Axle Shaft - Left Outer4WD3.702 Length or: Front Axle Shaft - Right Outer4WD3.702 Length	View on Amazon
MOOG Fits: all 2021 3500 engines	279	🇺🇸 US 🇨🇦 CA	Super StrengthGreasable Fitment notes — MOOG 279 Super StrengthGreasable Fits: Front Axle Shaft - Left Outer4WD3.702 Length or: Front Axle Shaft - Right Outer4WD3.702 Length	View on Amazon
MOOG Fits: all 2021 3500 engines	485	🇺🇸 US 🇨🇦 CA	Super StrengthGreasable Fitment notes — MOOG 485 Super StrengthGreasable Fits: Rear Driveshaft at Rear Axle4WDwith 1 Piece Rear Driveshaft or: Rear Driveshaft at Transmission4WDwith 1 Piece Rear Driveshaft or: Rear Driveshaft At Rear AxleRWDwith 1 Piece Rear Driveshaft or: Rear Driveshaft At TransmissionRWDwith 1 Piece Rear Driveshaft or: Rear Driveshaft At Rear AxleRWDwith 2 Piece Rear Driveshaft or: Rear Driveshaft At Support BearingRWDwith 2 Piece Rear Driveshaft or: Rear Driveshaft At TransmissionRWDwith 2 Piece Rear Driveshaft or: Rear Driveshaft At Rear Axle4WDwith 2 Piece Rear Driveshaft or: Rear Driveshaft At Support Bearing4WDwith 2 Piece Rear Driveshaft or: Rear Driveshaft At Transmission4WDwith 2 Piece Rear Driveshaft	View on Amazon

Standard Replacement

Brand	Part Number	Markets	Notes	Buy
DANA Popular Fits: all 2021 3500 engines	53212X	🇺🇸 US 🇨🇦 CA	SpicerNon-Greasable Fitment notes — DANA 53212X SpicerNon-Greasable Front Axle At Wheels4WDwith Inside Snap RingsAAM 1555 Series Drive Axlesfor OE#'S 68065428AA, 68065428AB, 68065428AC, 68065428AD, 74081555with AAM Front Axle	View on Amazon
GMB Popular Fits: all 2021 3500 engines	2101557	🇺🇸 US 🇨🇦 CA	GreasableGrease Fitting in Cross Fitment notes — GMB 2101557 GreasableGrease Fitting in Cross Front Axle at Wheels4WD	View on Amazon
SKF Popular Fits: all 2021 3500 engines	UJ479	🇺🇸 US 🇨🇦 CA	Greaseable Fitment notes — SKF UJ479 Greaseable Front Axle At Wheels4WDwith 2 Joint Rear Shaft & Serrated Front Pin. Flange or with 3 Joint Rear Shaft & Flat Faced Front Pin. Flange or with 2 Joint Rear Shaft & Flat Faced Front Pin. Flange or with 3 Joint Rear Shaft & Serrated Front Pin. Flange	View on Amazon
AAM Fits: all 2021 3500 engines	74081555A	🇺🇸 US 🇨🇦 CA	Front Axle At WheelsUses Internal Snap Rings Fitment notes — AAM 74081555A Front Axle At WheelsUses Internal Snap Ringswith 9.25 (In) Front Axle	View on Amazon
GMB Fits: all 2021 3500 engines	2100160	🇺🇸 US 🇨🇦 CA	GreasableGrease Fitting In CROSS Fitment notes — GMB 2100160 GreasableGrease Fitting In CROSSStandard Duty Front Driveshaft at Front Axle4WD	View on Amazon
GMB Fits: all 2021 3500 engines	2301555	🇺🇸 US 🇨🇦 CA	GreasableGrease Fitting in Cross Fitment notes — GMB 2301555 GreasableGrease Fitting in Cross Fits: Rear Shaft All JointsRWD2 Joint Driveshaft or: Rear Shaft All JointsRWD3 Joint Driveshaft or: Rear Shaft All Joints4WD2 Joint Driveshaft	View on Amazon
GMB Fits: all 2021 3500 engines	2141557	🇺🇸 US 🇨🇦 CA	Non-Greasable Fitment notes — GMB 2141557 Non-Greasable Front Axle at Wheels4WD	View on Amazon
MOOG Fits: all 2021 3500 engines	479	🇺🇸 US 🇨🇦 CA	Fits Front Axle Shaft - Left Outer4WD Fitment notes — MOOG 479 Fits: Front Axle Shaft - Left Outer4WD3.702" Length or: Front Axle Shaft - Right Outer4WD3.702" Length	View on Amazon
MOPAR Fits: all 2021 3500 engines	68451034AA	🇺🇸 US 🇨🇦 CA	Kit Fitment notes — MOPAR 68451034AA Kit Fits: Exc. Dual Rear WheelsCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Mega Cab8-SPD Auto 8HP75-LCV TransmissionHD 4WD Fits: Cummins EngineRegular Cab8 Foot Bed6 Speed Automatic 68RFE Transmission or: Cummins engine HO EngineDual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins engine HO EngineExc. Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins engine HO EngineExc. Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins EngineDual Rear WheelsMega Cab6 Speed Automatic 68RFE TransmissionHD 4WD or: Cummins EngineExc. Dual Rear WheelsCrew Cab Wheelbase 26 Speed Automatic 68RFE TransmissionHD 4WD	View on Amazon

Brand	Part Number	Markets	Notes	Buy
MOPAR Fits: all 2021 3500 engines	68451034AB	🇺🇸 US 🇨🇦 CA	Kit Fitment notes — MOPAR 68451034AB Kit Fits: Exc. Dual Rear WheelsCrew Cab Wheelbase 28-SPD Auto 8HP75-LCV TransmissionHD 4WD or: Mega Cab8-SPD Auto 8HP75-LCV TransmissionHD 4WD Fits: Cummins EngineRegular Cab8 Foot Bed6 Speed Automatic 68RFE Transmission or: Cummins engine HO EngineDual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins engine HO EngineExc. Dual Rear WheelsCrew Cab Wheelbase 26 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins engine HO EngineExc. Dual Rear WheelsMega Cab6 Speed Auto Aisin AS69RC HD TransHD 4WD or: Cummins EngineDual Rear WheelsMega Cab6 Speed Automatic 68RFE TransmissionHD 4WD or: Cummins EngineExc. Dual Rear WheelsCrew Cab Wheelbase 26 Speed Automatic 68RFE TransmissionHD 4WD	View on Amazon

This table covers the U-joints in the driveshaft.

Buying Drivetrain Parts for a 2021 Ram 3500

On this vehicle, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware.

Match the engine first. Some drivetrain parts fit every engine; others are engine-specific. Each row shows which engine(s) it fits.
Read the notes on each row for position, trim and spec qualifiers before you order.
Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.
Cross-reference the manufacturer part number against your old part or a service-manual listing.

Start with the largest groups on this page: Universal Joint and Drive Shaft .

Frequently Asked Questions

How many drivetrain parts fit the 2021 Ram 3500?

Our catalog currently lists 143 drivetrain parts for the 2021 Ram 3500 across 44 subcategories and 22 brands, covering both the 6.4L V8 and the 6.7L L6 DIESEL Turbocharged. Each part is matched to the engine(s) it fits.

Do drivetrain parts differ between 2021 Ram 3500 engines?

Some do. 123 parts fit every engine; the other 20 are engine-specific. Each row (and the filter at the top) shows which. If you're unsure which engine you have, check the emissions label under the hood or the 8th character of your VIN.

What are the signs of drivetrain problems on a 2021 Ram 3500?

Common symptoms include clicking in tight turns, a clunk when shifting between drive and reverse, vibration that builds with speed, or gear oil on the inside of a wheel. If you notice any of these, identify the affected subcategory above and cross-reference the part numbers listed.

What should I replace at the same time?

Where labor overlaps, replace the differential or transfer-case fluid with any axle or seal job while everything is already open.

What do the market flags (US, CA, MX) on each part mean?

They show the market for which the manufacturer published application data for that part — where the vehicle was first sold, not where the part was made. If your 2021 Ram 3500 was originally sold in the US, the safest choice is a part marked for the US market.

How do I make sure a part fits my 2021 Ram 3500?

First match the engine — each row shows which engine(s) the part fits. Then a torn CV boot caught early is a cheap boot kit; caught late it is a whole axle — inspect before deciding which to buy. The notes column carries position and trim qualifiers where they apply.

Other Parts for the 2021 Ram 3500

Belt Drive Body & Lamp Assembly Brake & Wheel Hub Cooling System Electrical Electrical Bulb & Socket Electrical Connector Electrical Switch & Relay Engine Exhaust & Emission Fuel & Air Heat & Air Conditioning Ignition Interior Steering Suspension Automatic Transmission Wheel Wiper & Washer

Drivetrain Parts for Other Ram 3500 Years

2026 Ram 3500 2025 Ram 3500 2024 Ram 3500 2023 Ram 3500 2022 Ram 3500 2020 Ram 3500 2019 Ram 3500 2018 Ram 3500 2017 Ram 3500 2016 Ram 3500 2015 Ram 3500 2014 Ram 3500

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Published by AutoFactsDB from manufacturer application data. How fitment is matched Report a fitment error