The 2021 Ram 1500 Classic has 108 drivetrain parts with verified fitment on this page — 23 part types and 29 brands, covering both the 3.6L V6 and the 5.7L V8. Each part includes a manufacturer part number and application notes.
The drivetrain system on the 2021 Ram 1500 Classic moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. The largest groups are Universal Joint (25 parts), CV Intermediate Shaft (12 parts) and CV Axle (10 parts). The other 20 part types cover the remaining 61 parts.
The 2021 Ram 1500 Classic was sold with both the 3.6L V6 and the 5.7L V8. 101 parts fit every engine; the other 7 are engine-specific. Each part shows which engine(s) it fits.
The most listed brands for 2021 Ram 1500 Classic drivetrain parts are DORMAN (18 parts), VALVOLINE (11 parts) and GSP (9 parts), plus 26 more brands. Quality grades include Standard Replacement, Heavy Duty and Economy.
17 parts on this 2021 Ram 1500 Classic page carry a "Popular" badge — the source catalog's flag for options frequently chosen for this vehicle — including DORMAN 630163 (Axle Shaft) and TRAKMOTIVE CH8256HDX (CV Axle). Click any part number to see every vehicle that part fits.
4WD Actuator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ROSTRA Fits: all 2021 1500 Classic engines | 730047 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| STANDARD MOTOR PRODUCTS Fits: all 2021 1500 Classic engines | TCA81 | 🇺🇸 US 🇨🇦 CA | View on Amazon | |
| WELLS Fits: all 2021 1500 Classic engines | 1S12657 | 🇺🇸 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.
3 4WD Actuator parts are listed for the 2021 Ram 1500 Classic, from ROSTRA, STANDARD MOTOR PRODUCTS and WELLS. All of them fit every engine offered in the 2021 1500 Classic.
This group includes ROSTRA 730047, STANDARD MOTOR PRODUCTS TCA81 and WELLS 1S12657.
4WD Disconnect
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 1500 Classic engines | 630157 | 🇺🇸 US 🇨🇦 CA | OE FIX | View on Amazon |
This table covers the disconnects that freewheel a front axle in two-wheel drive.
This group shows a single part: DORMAN 630157.
Axle Shaft
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: all 2021 1500 Classic engines | 630163 | 🇺🇸 US 🇨🇦 CA | Rear Left | View on Amazon |
| DORMAN Fits: all 2021 1500 Classic engines | 630162 | 🇺🇸 US 🇨🇦 CA | Rear Right | View on Amazon |
| DORMAN Fits: all 2021 1500 Classic engines | 630011 | 🇺🇸 US 🇨🇦 CA | OE FixIncludes Interim Shafts And 4WD Collar | View on Amazon |
| RICHMOND Fits: all 2021 1500 Classic engines | 9227485 | 🇺🇸 US 🇨🇦 CA | Excel34.35" Overall Length | View on Amazon |
| RICHMOND Fits: all 2021 1500 Classic engines | 9227484 | 🇺🇸 US 🇨🇦 CA | Excel33.89" Overall Length | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| MOTIVE GEAR Popular Fits: all 2021 1500 Classic engines | MG5004 | 🇺🇸 US 🇨🇦 CA | 33.89" Overall Length31 Spline | View on Amazon |
| MOTIVE GEAR Fits: all 2021 1500 Classic engines | MG5005 | 🇺🇸 US 🇨🇦 CA | 34.35" Overall Length31 Spline | View on Amazon |
This table covers the Axle shafts.
7 Axle Shaft parts are listed for the 2021 Ram 1500 Classic, from DORMAN, RICHMOND and MOTIVE GEAR. DORMAN 630163 carries the "Popular" badge. All of them fit every engine offered in the 2021 1500 Classic.
In the Economy grade, DORMAN and RICHMOND supply 5 parts: the catalog's value-priced group. A representative part number is DORMAN 630163.
The Standard Replacement section lists 2 options from MOTIVE GEAR — built to original-equipment specification. MOTIVE GEAR MG5004 is listed in this group.
Listed part numbers: DORMAN 630163, DORMAN 630162 and DORMAN 630011, plus the other parts above.
Axle Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER Fits: all 2021 1500 Classic engines | SS6644 | 🇺🇸 US 🇨🇦 CA | Front4WD | View on Amazon |
| TIMKEN Fits: all 2021 1500 Classic engines | SL260004 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
| TIMKEN Fits: all 2021 1500 Classic engines | SL260466 | 🇺🇸 US 🇨🇦 CA | Front4WD | 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.
3 Axle Shaft Seal parts for the 2021 Ram 1500 Classic come from 2 brands — TIMKEN and SCHAEFFLER. Every part fits both the 3.6L V6 and the 5.7L V8.
Part numbers include SCHAEFFLER SS6644, TIMKEN SL260004 and TIMKEN SL260466.
CV Axle
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TRAKMOTIVE Popular Fits: all 2021 1500 Classic engines | CH8256HDX | 🇺🇸 US 🇨🇦 CA | Extreme DutyDoes Not Include Clip | View on Amazon |
| GSP Fits: all 2021 1500 Classic engines | NCV10040XD | 🇺🇸 US 🇨🇦 CA | Xtreme Duty CV AxleFor Extreme Operating Temperatures | View on Amazon |
| TOP NOTCH Fits: all 2021 1500 Classic engines | TN30179XD | 🇺🇸 US 🇨🇦 CA | Xtreme Duty | View on Amazon |
Specialty - For Lifted Vehicles
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GSP Fits: all 2021 1500 Classic engines | NCV10040XDP | 🇺🇸 US 🇨🇦 CA | Extended Travel CV Axle | View on Amazon |
| TOP NOTCH Fits: all 2021 1500 Classic engines | TN30179XDP | 🇺🇸 US 🇨🇦 CA | Extended Travel | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GSP Popular Fits: all 2021 1500 Classic engines | NCV10040 | 🇺🇸 US 🇨🇦 CA | Front4WD | View on Amazon |
| GSP Fits: all 2021 1500 Classic engines | NCV22002 | 🇺🇸 US 🇨🇦 CA | Front4WD | View on Amazon |
| TOP NOTCH Fits: all 2021 1500 Classic engines | TN30179 | 🇺🇸 US 🇨🇦 CA | Front4WD | View on Amazon |
| TOP NOTCH Fits: all 2021 1500 Classic engines | TN30216 | 🇺🇸 US 🇨🇦 CA | Front4WD | View on Amazon |
| TRAKMOTIVE Fits: all 2021 1500 Classic engines | CH8256 | 🇺🇸 US 🇨🇦 CA | Does Not Include Clip | View on Amazon |
This table covers the complete CV axle shafts from differential (or hub) to wheel. Typical signs include a click in tight turns, grease flung around the wheel well, or a vibration that builds with speed. A torn boot caught early is a boot kit; caught late it is the whole axle. Torque the axle nut to the method in the notes.
10 CV Axle parts for the 2021 Ram 1500 Classic come from 3 brands — GSP, TOP NOTCH and TRAKMOTIVE. The "Popular" part is TRAKMOTIVE CH8256HDX. Every part fits both the 3.6L V6 and the 5.7L V8.
In the Heavy Duty grade, TRAKMOTIVE, GSP and TOP NOTCH supply 3 parts: rated for severe service. A representative part number is TRAKMOTIVE CH8256HDX.
In the Specialty - For Lifted Vehicles grade, GSP and TOP NOTCH supply 2 parts: grouped under the catalog's "Specialty - For Lifted Vehicles" designation — the notes column spells out what sets them apart. A representative part number is GSP NCV10040XDP.
Standard Replacement: 5 parts, from GSP, TOP NOTCH and TRAKMOTIVE. A representative part number is GSP NCV10040.
CV Intermediate Shaft
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 1500 Classic engines | 630457 | 🇺🇸 US 🇨🇦 CA | OE FIX | View on Amazon |
| DORMAN Fits: all 2021 1500 Classic engines | 630446 | 🇺🇸 US 🇨🇦 CA | OE FIX | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GSP Popular Fits: all 2021 1500 Classic engines | NEX12005 | 🇺🇸 US 🇨🇦 CA | Front Right Outer4WD | View on Amazon |
| GSP Popular Fits: all 2021 1500 Classic engines | NEX12000 | 🇺🇸 US 🇨🇦 CA | Front Right4WD | View on Amazon |
| TOP NOTCH Popular Fits: all 2021 1500 Classic engines | TN30219IS | 🇺🇸 US 🇨🇦 CA | Front Right4WD | View on Amazon |
| GSP Fits: all 2021 1500 Classic engines | NEX12015 | 🇺🇸 US 🇨🇦 CA | Front Right | View on Amazon |
| GSP Fits: all 2021 1500 Classic engines | NEX12013 | 🇺🇸 US 🇨🇦 CA | NewIntermediate Shaft Kit | View on Amazon |
| GSP Fits: all 2021 1500 Classic engines | NEX12014 | 🇺🇸 US 🇨🇦 CA | NewIntermediate Shaft Kit | View on Amazon |
| TOP NOTCH Fits: all 2021 1500 Classic engines | TN30229IS | 🇺🇸 US 🇨🇦 CA | New Intermediate ShaftBearing Included | View on Amazon |
| TOP NOTCH Fits: all 2021 1500 Classic engines | TN30230IS | 🇺🇸 US 🇨🇦 CA | New Intermediate Shaft KitBearing Included | View on Amazon |
| USA STANDARD GEAR Fits: all 2021 1500 Classic engines | USA12237 | 🇺🇸 US 🇨🇦 CA | Front Right Outer4WD | View on Amazon |
| USA STANDARD GEAR Fits: all 2021 1500 Classic engines | USA21921 | 🇺🇸 US 🇨🇦 CA | Front Left4WD | View on Amazon |
This table covers the CV Intermediate shafts.
12 CV Intermediate Shaft parts are listed for the 2021 Ram 1500 Classic, from GSP, TOP NOTCH, DORMAN and 1 other brand. GSP NEX12005 carries the "Popular" badge. All of them fit every engine offered in the 2021 1500 Classic.
Economy: 2 parts, from DORMAN. A representative part number is DORMAN 630457.
The Standard Replacement section: 10 options from GSP, TOP NOTCH and USA STANDARD GEAR. GSP NEX12005 is listed in this group.
Differential Carrier
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| USA STANDARD GEAR Fits: all 2021 1500 Classic engines | USA26036 | 🇺🇸 US 🇨🇦 CA | Yukon Dura Grip | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| USA STANDARD GEAR Fits: all 2021 1500 Classic engines | USA12386 | 🇺🇸 US 🇨🇦 CA | Carrier case | View on Amazon |
| USA STANDARD GEAR Fits: all 2021 1500 Classic engines | USA20137 | 🇺🇸 US 🇨🇦 CA | Carrier case | View on Amazon |
This table covers the carriers that hold the differential gears in the axle.
3 Differential Carrier parts for the 2021 Ram 1500 Classic come from USA STANDARD GEAR. Every part fits both the 3.6L V6 and the 5.7L V8.
Heavy Duty: 1 part, from USA STANDARD GEAR. A representative part number is USA STANDARD GEAR USA26036.
Standard Replacement: 2 parts, from USA STANDARD GEAR. A representative part number is USA STANDARD GEAR USA12386.
This group includes USA STANDARD GEAR USA26036, USA STANDARD GEAR USA12386 and USA STANDARD GEAR USA20137.
Differential Cover Gasket
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| FEL-PRO Fits: all 2021 1500 Classic engines | RDS55073 | 🇺🇸 US 🇨🇦 CA | Rearwith 9.25 (In) Ring Gear | 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.
This group shows a single part: FEL-PRO RDS55073.
Differential Cover Plug
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 1500 Classic engines | 090062 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
This table covers the Differential Cover plugs. Typical signs include a leak at the drain or glow-plug hole, or a plug that has rounded off. Replace the crush washer and torque to the spec in the notes.
One part is listed for the 2021 Ram 1500 Classic — DORMAN 090062.
Differential Lock Actuator
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 1500 Classic engines | 600399 | 🇺🇸 US 🇨🇦 CA | Front4WD | View on Amazon |
| SKP Fits: all 2021 1500 Classic engines | SK600399 | 🇺🇸 US 🇨🇦 CA | Front4WD | View on Amazon |
This table covers the Differential Lock actuators. 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.
2 Differential Lock Actuator parts for the 2021 Ram 1500 Classic come from 2 brands — DORMAN and SKP. Every part fits both the 3.6L V6 and the 5.7L V8.
Part numbers include DORMAN 600399 and SKP SK600399.
Differential Pinion Flange
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 1500 Classic engines | 697150 | 🇺🇸 US 🇨🇦 CA | Kit | View on Amazon |
| DORMAN Fits: all 2021 1500 Classic engines | 697020 | 🇺🇸 US 🇨🇦 CA | Rear | View on Amazon |
This table covers the flanges that connect the driveshaft to the differential pinion.
2 Differential Pinion Flange parts for the 2021 Ram 1500 Classic come from DORMAN. Every part fits both the 3.6L V6 and the 5.7L V8.
This group includes DORMAN 697150 and DORMAN 697020.
Differential Pinion Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TIMKEN Fits: all 2021 1500 Classic engines | SL260540 | 🇺🇸 US 🇨🇦 CA | FrontExpress or SLT Model or Tradesman or Warlock | 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.
This group shows a single part: TIMKEN SL260540.
Differential Rebuild Kit
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| AUTOTECNICA Fits: all 2021 1500 Classic engines | DG0418511 | 🇺🇸 US 🇨🇦 CA | FrontRepairs Front Right Axle | View on Amazon |
| DORMAN Fits: all 2021 1500 Classic engines | 697040 | 🇺🇸 US 🇨🇦 CA | Rear9.25" Ring Gear | View on Amazon |
| USA STANDARD GEAR Fits: all 2021 1500 Classic engines | USA12384 | 🇺🇸 US 🇨🇦 CA | Yukon Master Kit | View on Amazon |
This table covers kits that group the bearings, races and seals for a differential rebuild.
3 Differential Rebuild Kit parts are listed for the 2021 Ram 1500 Classic, from AUTOTECNICA, DORMAN and USA STANDARD GEAR. All of them fit every engine offered in the 2021 1500 Classic.
Listed part numbers: AUTOTECNICA DG0418511, DORMAN 697040 and USA STANDARD GEAR USA12384.
Drive Shaft
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| TOP NOTCH Popular Fits: all 2021 1500 Classic engines | TN1215PS | 🇺🇸 US 🇨🇦 CA | Front4WD | View on Amazon |
| TOP NOTCH Popular Fits: all 2021 1500 Classic engines | TN1213PS | 🇺🇸 US 🇨🇦 CA | Rear4WD | View on Amazon |
| DORMAN Fits: all 2021 1500 Classic engines | 938095 | 🇺🇸 US 🇨🇦 CA | Length: 33.75" | View on Amazon |
| DORMAN Fits: all 2021 1500 Classic engines | 976041 | 🇺🇸 US 🇨🇦 CA | Length: 73.875" | View on Amazon |
| DORMAN Fits: all 2021 1500 Classic engines | 976624 | 🇺🇸 US 🇨🇦 CA | Length: 53.88" | View on Amazon |
| DORMAN Fits: 5.7L V8 | 986225 | 🇺🇸 US 🇨🇦 CA | Length: 82.75" | View on Amazon |
| TRAKMOTIVE Fits: all 2021 1500 Classic engines | CHP426 | 🇺🇸 US 🇨🇦 CA | Rear4WD | View on Amazon |
This table covers the driveshafts that carry torque from the transmission or transfer case.
7 Drive Shaft parts are listed for the 2021 Ram 1500 Classic, from DORMAN, TOP NOTCH and TRAKMOTIVE. TOP NOTCH TN1215PS carries the "Popular" badge. 6 parts fit every engine; the other 1 is engine-specific.
This group includes TOP NOTCH TN1215PS, TOP NOTCH TN1213PS and DORMAN 938095 and the remaining parts above.
Drive Shaft Bolt
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 1500 Classic engines | 13864 | 🇺🇸 US 🇨🇦 CA | Fits Rear | View on Amazon |
This table covers the Drive Shaft bolts.
This group shows a single part: DORMAN 13864.
Drive Shaft Center Support Bearing
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VAICO Fits: all 2021 1500 Classic engines | V330684 | 🇺🇸 US 🇨🇦 CA | Express or SLT Model or Tradesman or WarlockGrade: AM | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ANCHOR Fits: all 2021 1500 Classic engines | 6139 | 🇺🇸 US 🇨🇦 CA | Rearwith 40mm Inside Diameter Bearing(s) | View on Amazon |
| PIONEER Fits: all 2021 1500 Classic 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.
3 Drive Shaft Center Support Bearing parts are listed for the 2021 Ram 1500 Classic, from VAICO, ANCHOR and PIONEER. All of them fit every engine offered in the 2021 1500 Classic.
Economy: 1 part, from VAICO. A representative part number is VAICO V330684.
The Standard Replacement section: 2 options from ANCHOR and PIONEER. ANCHOR 6139 is listed in this group.
Part numbers include VAICO V330684, ANCHOR 6139 and PIONEER 646139.
Drive Shaft Slip Yoke
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DANA Fits: all 2021 1500 Classic engines | 5010279 | 🇺🇸 US 🇨🇦 CA | Spicer | View on Amazon |
This table covers the Drive Shaft Slip yokes.
One part is listed for the 2021 Ram 1500 Classic — DANA 5010279.
Gear Oil
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VALVOLINE Popular Fits: all 2021 1500 Classic engines | VV975 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart | View on Amazon |
| IDEMITSU Fits: 3.6L V6 | 30305024750 | 🇺🇸 US | 75W90 Racing Gear Oil1 Quart | View on Amazon |
| IDEMITSU Fits: 5.7L V8 | 30305075750 | 🇺🇸 US | 75W90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE Fits: all 2021 1500 Classic engines | 889785 | 🇺🇸 US 🇨🇦 CA | Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill | View on Amazon |
| VALVOLINE Fits: all 2021 1500 Classic engines | 882505 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon | View on Amazon |
| VALVOLINE Fits: all 2021 1500 Classic engines | 723856 | 🇺🇸 US 🇨🇦 CA | Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon | View on Amazon |
| VALVOLINE Fits: 3.6L V6 | 819195 | 🇺🇸 US 🇨🇦 CA | VPS Full Synthetic SAE 75W-90 Gear Oil1 Quart | View on Amazon |
| VALVOLINE Fits: 3.6L V6 | 892683 | 🇺🇸 US 🇨🇦 CA | Syngard Heavy Duty Full Synthetic SAE 75W-90 Gear Oil208 L | View on Amazon |
| VALVOLINE Fits: 3.6L V6 | 892802 | 🇺🇸 US 🇨🇦 CA | Syngard Heavy Duty Full Synthetic SAE 75W-90 Gear Oil15.8 Gallon | View on Amazon |
| VALVOLINE Fits: 3.6L V6 | 902146 | 🇺🇸 US 🇨🇦 CA | Extended Protection Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill | 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.
10 Gear Oil parts for the 2021 Ram 1500 Classic come from 2 brands — VALVOLINE and IDEMITSU. The "Popular" part is VALVOLINE VV975. 4 parts fit every engine; the other 6 are engine-specific.
Transfer Case Control Module
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Fits: all 2021 1500 Classic engines | 599099 | 🇺🇸 US 🇨🇦 CA | Fits 4WDBody code DS | View on Amazon |
This table covers the Transfer Case control modules.
One part is listed for the 2021 Ram 1500 Classic — DORMAN 599099.
Transfer Case Fluid
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| VAICO Fits: all 2021 1500 Classic engines | V600430 | 🇺🇸 US 🇨🇦 CA | Transfer Case Oil DTF-1 L | View on Amazon |
| VALVOLINE Fits: all 2021 1500 Classic engines | 798153 | 🇺🇸 US 🇨🇦 CA | Dexron III / Mercon ATF1 Quart | View on Amazon |
| VALVOLINE Fits: all 2021 1500 Classic engines | 773636 | 🇺🇸 US 🇨🇦 CA | Dexron III / Mercon ATF1 Gallon | View on Amazon |
| VALVOLINE Fits: all 2021 1500 Classic engines | VV349 | 🇺🇸 US 🇨🇦 CA | Dexron III / Mercon ATF5 Gallon Pail | 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.
4 Transfer Case Fluid parts for the 2021 Ram 1500 Classic come from 2 brands — VALVOLINE and VAICO. Every part fits both the 3.6L V6 and the 5.7L V8.
Part numbers include VAICO V600430, VALVOLINE 798153 and VALVOLINE 773636, among others listed above.
Transfer Case Motor
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DORMAN Popular Fits: all 2021 1500 Classic engines | 600908 | 🇺🇸 US 🇨🇦 CA | 4WDCase Model BW44-44 or BW-44-45 | View on Amazon |
| SKP Popular Fits: all 2021 1500 Classic engines | SK600908 | 🇺🇸 US 🇨🇦 CA | 4WDCase Model BW44-44 or BW-44-45 | View on Amazon |
| AUTOTECNICA Fits: all 2021 1500 Classic engines | GM0518216 | 🇺🇸 US 🇨🇦 CA | 4WDCase Model BW44-44 or BW-44-45 | View on Amazon |
| LARES Fits: all 2021 1500 Classic engines | 30350 | 🇺🇸 US 🇨🇦 CA | 4WDCase Model BW44-44 or BW-44-45 | View on Amazon |
| STANDARD MOTOR PRODUCTS Fits: all 2021 1500 Classic engines | TCM100 | 🇺🇸 US 🇨🇦 CA | Finish: All Standard | View on Amazon |
| WAI GLOBAL Fits: all 2021 1500 Classic engines | TC1013 | 🇺🇸 US 🇨🇦 CA | 4WDCase Model BW44-44 or BW-44-45 | 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.
6 Transfer Case Motor parts are listed for the 2021 Ram 1500 Classic, from DORMAN, SKP, AUTOTECNICA and 3 other brands. DORMAN 600908 carries the "Popular" badge. All of them fit every engine offered in the 2021 1500 Classic.
This group includes DORMAN 600908, SKP SK600908 and AUTOTECNICA GM0518216 and the remaining parts above.
Transfer Case Output Shaft Seal
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| SCHAEFFLER Fits: all 2021 1500 Classic engines | SS2884 | 🇺🇸 US 🇨🇦 CA | Rear4WD | 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.
This group shows a single part: SCHAEFFLER SS2884.
Universal Joint
Economy
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| DANA Fits: all 2021 1500 Classic engines | 15178X | 🇺🇸 US 🇨🇦 CA | SVLGreasable | View on Amazon |
| DANA Fits: all 2021 1500 Classic engines | 25178X | 🇺🇸 US 🇨🇦 CA | Spicer SelectGreasable | View on Amazon |
Heavy Duty
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| ACDELCO Fits: all 2021 1500 Classic engines | 45U0109 | 🇺🇸 US 🇨🇦 CA | Greasable Super Strength | View on Amazon |
| ACDELCO Fits: all 2021 1500 Classic engines | 45U0123 | 🇺🇸 US 🇨🇦 CA | Non-Greasable Super Strength | View on Amazon |
| DANA Fits: all 2021 1500 Classic engines | 51350X | 🇺🇸 US 🇨🇦 CA | Spicer Life Series (SPL)Non-Greasable | View on Amazon |
| DANA Fits: all 2021 1500 Classic engines | 51350XP | 🇺🇸 US 🇨🇦 CA | Spicer Life Series (SPL) PlusNon-Greasable | View on Amazon |
| DANA Fits: all 2021 1500 Classic engines | 513501X | 🇺🇸 US 🇨🇦 CA | Spicer Life Series (SPL)Greasable | View on Amazon |
| DANA Fits: all 2021 1500 Classic engines | SPL301350XC | 🇺🇸 US 🇨🇦 CA | Spicer Life Series (SPL)Non-Greasable | View on Amazon |
| GMB Fits: all 2021 1500 Classic engines | 2150178 | 🇺🇸 US 🇨🇦 CA | Performance GradeGreasable | View on Amazon |
| MOOG Fits: all 2021 1500 Classic engines | 231 | 🇺🇸 US 🇨🇦 CA | Super StrengthNon-Greasable | View on Amazon |
| MOOG Fits: all 2021 1500 Classic engines | 232 | 🇺🇸 US 🇨🇦 CA | Super StrengthGreasable | View on Amazon |
| MOOG Fits: all 2021 1500 Classic engines | 487 | 🇺🇸 US 🇨🇦 CA | Super StrengthGreasable | View on Amazon |
| SKF Fits: all 2021 1500 Classic engines | UJ231 | 🇺🇸 US 🇨🇦 CA | Brute Force Non Greaseable | View on Amazon |
| SKF Fits: all 2021 1500 Classic engines | UJ232 | 🇺🇸 US 🇨🇦 CA | Brute Force Greaseable | View on Amazon |
Standard Replacement
| Brand | Part Number | Markets | Notes | Buy |
|---|---|---|---|---|
| GMB Popular Fits: all 2021 1500 Classic engines | 2100213 | 🇺🇸 US 🇨🇦 CA | GreasableGrease Fitting in Cross | View on Amazon |
| GMB Popular Fits: all 2021 1500 Classic engines | 2100178 | 🇺🇸 US 🇨🇦 CA | GreasableGrease Fitting in Cross | View on Amazon |
| GMB Popular Fits: all 2021 1500 Classic engines | 2100447 | 🇺🇸 US 🇨🇦 CA | Non-Greasable1.188" Bearing Cap Diameter | View on Amazon |
| MOOG Popular Fits: all 2021 1500 Classic engines | 331 | 🇺🇸 US 🇨🇦 CA | Greasable | View on Amazon |
| SKF Popular Fits: all 2021 1500 Classic engines | UJ331 | 🇺🇸 US 🇨🇦 CA | Greaseable | View on Amazon |
| AAM Fits: all 2021 1500 Classic engines | 19256728 | 🇺🇸 US 🇨🇦 CA | Rear ShaftRWD | View on Amazon |
| ACDELCO Fits: all 2021 1500 Classic engines | 45U0103 | 🇺🇸 US 🇨🇦 CA | Gold | View on Amazon |
| DANA Fits: all 2021 1500 Classic engines | 5178X | 🇺🇸 US 🇨🇦 CA | SpicerGreasable | View on Amazon |
| FVP Fits: all 2021 1500 Classic engines | 2100447 | 🇺🇸 US 🇨🇦 CA | Non-Greasable1.188" Bearing Cap Diameter | View on Amazon |
| GMB Fits: all 2021 1500 Classic engines | 2101203 | 🇺🇸 US 🇨🇦 CA | GreasableGrease Fitting in Cross | View on Amazon |
| SKF Fits: all 2021 1500 Classic engines | UJ331C | 🇺🇸 US 🇨🇦 CA | Greaseable | View on Amazon |
This table covers the U-joints in the driveshaft.
25 Universal Joint parts for the 2021 Ram 1500 Classic come from 7 brands — DANA, GMB, MOOG and 4 other brands. The "Popular" part is GMB 2100213. Every part fits both the 3.6L V6 and the 5.7L V8.
The Economy section: 2 options from DANA. DANA 15178X is listed in this group.
Heavy Duty: 12 parts, from DANA, MOOG, ACDELCO and 2 other brands. A representative part number is ACDELCO 45U0109.
Standard Replacement: 11 parts, from GMB, SKF, MOOG and 4 other brands. A representative part number is GMB 2100213.
Buying Drivetrain Parts for a 2021 Ram 1500 Classic
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 CV Intermediate Shaft .
Frequently Asked Questions
How many drivetrain parts fit the 2021 Ram 1500 Classic?
Our catalog currently lists 108 drivetrain parts for the 2021 Ram 1500 Classic across 23 subcategories and 29 brands, covering both the 3.6L V6 and the 5.7L V8. Each part is matched to the engine(s) it fits.
Do drivetrain parts differ between 2021 Ram 1500 Classic engines?
Some do. 101 parts fit every engine; the other 7 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 1500 Classic?
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 1500 Classic 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 1500 Classic?
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 1500 Classic
Drivetrain Parts for Other Ram 1500 Classic Years
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Manufacturer names, model designations and part numbers are used for identification and fitment reference only. AutoFactsDB is an independent catalog and is not affiliated with, endorsed by, or sponsored by any vehicle manufacturer displayed on this page.