2005 Cadillac STS Drivetrain Parts

Engine:

Showing parts for every engine. Select an engine to see only what fits.

138 Drivetrain parts are listed for the 2005 Cadillac STS, in 36 part types, covering both the 3.6L V6 and the 4.6L V8. Each one has a brand, a manufacturer part number and notes that say where it fits.

On the 2005 Cadillac STS, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 43 parts of the 138 listed are CV Axle (19 parts), Transfer Case Fluid (14 parts) and Drive Shaft Center Support Bearing (10 parts). The other 33 part types cover the remaining 95 parts.

Axle Intermediate Shaft Seal

Brand Part Number Markets Notes Buy
TIMKEN Fits: all 2005 STS engines 223240
🇺🇸 US 🇨🇦 CA
Front Left InnerAWD
Fitment notes — TIMKEN 223240
Front Left InnerAWDIntermediateIntermediate Shaft
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This table covers the seals at the Axle Intermediate 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.

Axle Shaft Lock / Snap Ring

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 90223082
🇺🇸 US 🇨🇦 CA
Fits RearTrans.Code 5L50-E
Fitment notes — GM GENUINE 90223082
Fits:
RearTrans.Code 5L50-E5 Speed Automatic Trans.RETAINING30.6 FREE OD,23.2 ID
or:
RearTrans.Code 5L40-E5 Speed Automatic Trans.RETAININGExc. Painted Prop Shaft(JNG)30.6 FREE OD,23.2 ID3.42 Rear Axle Ratio (GU6)
Fits:
RearTrans.Code 4L80-E4 Speed Automatic Trans.RETAINING30.6 FREE OD,23.2 ID
or:
RearTrans.Code 5L50-E5 Speed Automatic Trans.RETAINING30.6 FREE OD,23.2 ID
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This table covers the Axle Shaft Lock / Snap rings.

Axle Shaft Seal

Brand Part Number Markets Notes Buy
GM GENUINE Popular Fits: all 2005 STS engines 291331
🇺🇸 US 🇨🇦 CA
Fits RearOutside Diameter of Lip
Fitment notes — GM GENUINE 291331
Fits:
RearOutside Diameter of Lip
or:
FrontOutside Diameter of Lip
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NATIONAL Popular Fits: all 2005 STS engines 711066
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Rearwith 4.378 IN Ring Gear
Fitment notes — NATIONAL 711066
Rearwith 4.378 IN Ring Gearwith Getrag 645 Differential
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NATIONAL Fits: all 2005 STS engines 710853
🇺🇸 US 🇨🇦 CA
FrontAWD
Fitment notes — NATIONAL 710853
FrontAWDwith 6.378 IN Ring Gearwith Getrag 650 Transmission
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SKF Fits: all 2005 STS engines 12720
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Front Left
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TIMKEN Fits: all 2005 STS engines 223240
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Fits Rear
Fitment notes — TIMKEN 223240
Fits:
Rear
or:
Front RightAWDFrom 2009 To 2011
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WJB / INMOTION PARTS Fits: all 2005 STS engines WS710853
🇺🇸 US 🇨🇦 CA
FrontAWD
Fitment notes — WJB / INMOTION PARTS WS710853
FrontAWDwith 6.378 IN Ring Gearwith Getrag 650 Transmission
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WJB / INMOTION PARTS Fits: all 2005 STS engines WS711066
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Rearwith Getrag 645 Differential
Fitment notes — WJB / INMOTION PARTS WS711066
Rearwith Getrag 645 Differentialwith 4.378 IN Ring Gear
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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 Axle

Economy

Brand Part Number Markets Notes Buy
HERI Popular Fits: all 2005 STS engines 70091
🇺🇸 US 🇨🇦 CA
Rear LeftAWD
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CARDONE Fits: all 2005 STS engines 601416
🇺🇸 US 🇨🇦 CA
Remanufactured
Fitment notes — CARDONE 601416
Remanufactured
Front RightAWD
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CARDONE Fits: all 2005 STS engines 601455
🇺🇸 US 🇨🇦 CA
Remanufactured
Fitment notes — CARDONE 601455
Remanufactured
Rear RightAWD
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Standard Replacement

Brand Part Number Markets Notes Buy
APWI Popular Fits: all 2005 STS engines GM8387
🇺🇸 US 🇨🇦 CA
Front LeftAWD
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APWI Popular Fits: all 2005 STS engines GM8388
🇺🇸 US 🇨🇦 CA
Front RightAWD
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TOP NOTCH Popular Fits: 4.6L V8 TN20100
🇺🇸 US 🇨🇦 CA
Front Right
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TOP NOTCH Popular Fits: 4.6L V8 TN20096
🇺🇸 US 🇨🇦 CA
Front Left
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CARDONE Fits: all 2005 STS engines 661454
🇺🇸 US 🇨🇦 CA
Rear LeftAWD
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GSP Fits: all 2005 STS engines NCV17001
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Rear LeftAWD
Fitment notes — GSP NCV17001
Rear LeftAWD
Rear LeftRWD
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GSP Fits: 4.6L V8 NCV10904
🇺🇸 US 🇨🇦 CA
Rear LeftAWD
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GSP Fits: 4.6L V8 NCV10242
🇺🇸 US 🇨🇦 CA
Front Right
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GSP Fits: 4.6L V8 NCV10236
🇺🇸 US 🇨🇦 CA
Front Left
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GSP Fits: 4.6L V8 NCV10905
🇺🇸 US 🇨🇦 CA
Rear RightAWD
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TOP NOTCH Fits: all 2005 STS engines TN20120
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Rear LeftAWD
Fitment notes — TOP NOTCH TN20120
Rear LeftAWD
Rear LeftRWD
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TOP NOTCH Fits: 4.6L V8 TN20116
🇺🇸 US 🇨🇦 CA
Rear LeftAWD
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TRAKMOTIVE Fits: all 2005 STS engines GM8224
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Does Not Include ABS Ring
Fitment notes — TRAKMOTIVE GM8224
Does Not Include ABS Ring
Rear Left
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TRAKMOTIVE Fits: all 2005 STS engines GM8225
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Does Not Include ABS Ring
Fitment notes — TRAKMOTIVE GM8225
Does Not Include ABS Ring
Rear Right
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TRAKMOTIVE Fits: all 2005 STS engines GM8223
🇺🇸 US 🇨🇦 CA
Does Not Include ABS Ring
Fitment notes — TRAKMOTIVE GM8223
Does Not Include ABS Ring
Front RightAWD
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TRAKMOTIVE Fits: all 2005 STS engines GM8212
🇺🇸 US 🇨🇦 CA
Does Not Include ABS Ring
Fitment notes — TRAKMOTIVE GM8212
Does Not Include ABS Ring
Front LeftAWD
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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.

CV Joint Boot

Brand Part Number Markets Notes Buy
MEVOTECH Fits: all 2005 STS engines DX515
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Front Inner
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MEVOTECH Fits: all 2005 STS engines DX437
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Front Outer
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MEVOTECH Fits: all 2005 STS engines DX877
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Rear Outer
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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 Carrier Bolt

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 11561300
🇺🇸 US 🇨🇦 CA
M14X2X101
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GM GENUINE Fits: all 2005 STS engines 89058602
🇺🇸 US 🇨🇦 CA
M8X1.25X30,24 ThreadFlange Head
Fitment notes — GM GENUINE 89058602
M8X1.25X30,24 ThreadFlange Head17OD
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GM GENUINE Fits: all 2005 STS engines 11519346
🇺🇸 US 🇨🇦 CA
Bolt-HFH with CON WA,M12X1.75X60,34 THD
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This table covers the Differential Carrier bolts.

Differential Carrier Bushing

Brand Part Number Markets Notes Buy
DORMAN Fits: all 2005 STS engines 523223
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
RearSupport Bushing
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GM GENUINE Fits: all 2005 STS engines 89058605
🇺🇸 US 🇨🇦 CA
5 speed Automatic trans.Bushing with Metal Sleeve
Fitment notes — GM GENUINE 89058605
5 speed Automatic trans.Bushing with Metal Sleeve
Fits:
5 speed Automatic trans.Bushing with Metal Sleev
or:
Trans. code 4L80-E4 speed Automatic trans.Bushing with Metal Sleeve
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This table covers the Differential Carrier 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.

Differential Cover Bolt

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 89058602
🇺🇸 US 🇨🇦 CA
M8X1.25X30,24 ThreadFlange Head
Fitment notes — GM GENUINE 89058602
M8X1.25X30,24 ThreadFlange Head17OD
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This table covers the Differential Cover bolts.

Differential Fill / Drain Plug

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 19256069
🇺🇸 US 🇨🇦 CA
Includes Seal
Fitment notes — GM GENUINE 19256069
Includes Seal
Fits:
Rear DifferentialM22
or:
Front DifferentialM22
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This table covers the Differential Fill drain plugs.

Differential Pinion Bearing / Race

Brand Part Number Markets Notes Buy
BCA Popular Fits: all 2005 STS engines NBNP922169
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Bearing Only
Fitment notes — BCA NBNP922169
Bearing Only
Rear Innerwith Getrag 645 Axle(S)with 4.378 IN Ring GearBearing Cone Only
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BCA Popular Fits: all 2005 STS engines NBA67
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Taper Bearing SetIncludes Cup and Cone
Fitment notes — BCA NBA67
Taper Bearing SetIncludes Cup and Cone
Rear Innerwith Getrag 645 Axle(S)with 4.378 IN Ring Gear
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BCA Fits: all 2005 STS engines NBNP233028
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Race
Fitment notes — BCA NBNP233028
Race
Rear Innerwith Getrag 645 Axle(S)with 4.378 IN Ring Gear
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NATIONAL Fits: all 2005 STS engines NP233028
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Race
Fitment notes — NATIONAL NP233028
Race
Rear Innerwith 4.378 IN Ring Gearwith Getrag 645 Axle
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NATIONAL Fits: all 2005 STS engines NP922169
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Rear InnerTaper Bearing Cone Style
Fitment notes — NATIONAL NP922169
Rear InnerTaper Bearing Cone Stylewith 4.378 IN Ring Gearwith Getrag 645 Axle
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NATIONAL Fits: all 2005 STS engines A67
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Taper Bearing Set Includes Cup and Cone
Fitment notes — NATIONAL A67
Taper Bearing Set Includes Cup and Cone
Rear Innerwith 4.378 IN Ring Gearwith Getrag 645 Axle
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This table covers the bearings and races on the differential pinion.

Differential Pinion Bearing Bolt

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 89058602
🇺🇸 US 🇨🇦 CA
M8X1.25X30,24 ThreadFlange Head
Fitment notes — GM GENUINE 89058602
M8X1.25X30,24 ThreadFlange Head17OD
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This table covers the Differential Pinion Bearing bolts.

Differential Pinion Flange

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 19179936
🇺🇸 US 🇨🇦 CA
FrontUSE without CASTING NUMBER 6507022390 ON HOUSING Front DIFF DRV PINION GEAR FOR 2ND DESIGN SEAL SERVICED SEPARATELY SEE 19132939.
Fitment notes — GM GENUINE 19179936
FrontUSE without CASTING NUMBER 6507022390 ON HOUSING Front DIFF DRV PINION GEAR FOR 2ND DESIGN SEAL SERVICED SEPARATELY SEE 19132939.INCLUDES FLANGE,SEAL AND NUT1st Design
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GM GENUINE Fits: all 2005 STS engines 19179933
🇺🇸 US 🇨🇦 CA
Fits Trans. code 5L40-E5 speed Automatic trans.
Fitment notes — GM GENUINE 19179933
Fits:
Trans. code 5L40-E5 speed Automatic trans.USE without CASTING NUMBER 6457038590 ON HOUSING DIFF DRV PINION GEAR, FOR 2ND DESIGN SEAL SERVICED SEPARATELY SEE 25861283.INCLUDES FLANGE (105MM),SEAL AND NUT1st Designor Trans. code 5L50-E5 speed Automatic trans.USE without CASTING NUMBER 6457038590 ON HOUSING DIFF DRV PINION GEAR,FOR 2ND DESIGN SEAL SERVICED SEPARATELY SEE 25861283.INCLUDES FLANGE (105MM),SEAL AND NUT1st Design
Fits:
Trans. code 5L40-E5 speed Automatic trans.USE without CASTING NUMBER 6457038590 ON HOUSING DIFF DRV PINION GEAR, FOR 2ND DESIGN SEAL SERVICED SEPARATELY SEE 25861283.INCLUDES FLANGE (105MM),SEAL AND NUT1st Designor Trans. code 5L50-E5 speed Automatic trans.USE without CASTING NUMBER 6457038590 ON HOUSING DIFF DRV PINION GEAR,FOR 2ND DESIGN SEAL SERVICED SEPARATELY SEE 25861283.INCLUDES FLANGE (105MM),SEAL AND NUT1st Designor Trans. Code 4L80-E4 speed Automatic trans.with VIN 50206731 and Later and without Casting # 6457038590 On HSG Diff DRV Pinion Gear, For 3rd DES See 25861283 Seal Only.Includes Flange (105mm), Seal, Nut2nd Design
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This table covers the flanges that connect the driveshaft to the differential pinion.

Differential Pinion Nut

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 89047861
🇺🇸 US 🇨🇦 CA
Front
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This table covers the Differential Pinion nuts.

Differential Pinion Repair Sleeve

Brand Part Number Markets Notes Buy
BCA Fits: all 2005 STS engines NS99215
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Front Outerwith 650 Transmission Code
Fitment notes — BCA NS99215
Front Outerwith 650 Transmission Codewith 6.378 IN Ring GearGetrag Transmission
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NATIONAL Fits: all 2005 STS engines 99215
🇺🇸 US 🇨🇦 CA
Front OuterAWD
Fitment notes — NATIONAL 99215
Front OuterAWDwith 6.378 IN Ring Gearwith Getrag 650 Transmission
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WJB / INMOTION PARTS Fits: all 2005 STS engines WS99215
🇺🇸 US 🇨🇦 CA
Front OuterAWD
Fitment notes — WJB / INMOTION PARTS WS99215
Front OuterAWDwith 6.378 IN Ring Gearwith Getrag 650 Transmission
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This table covers the wear sleeves used to restore a grooved pinion seal surface.

Differential Pinion Seal

Brand Part Number Markets Notes Buy
NATIONAL Popular Fits: all 2005 STS engines 710998
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Rear Outerwith 7.625 IN Ring Gear
Fitment notes — NATIONAL 710998
Rear Outerwith 7.625 IN Ring Gearwith Getrag 645 Differential
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NATIONAL Popular Fits: all 2005 STS engines 711081
🇺🇸 US 🇨🇦 CA
Front OuterAWD
Fitment notes — NATIONAL 711081
Front OuterAWDwith 6.378 IN Ring Gearwith Getrag 650 Transmission
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GM GENUINE Fits: all 2005 STS engines 19132939
🇺🇸 US 🇨🇦 CA
FrontRadial Lip Design
Fitment notes — GM GENUINE 19132939
FrontRadial Lip DesignCan Use Seal Only with Casting # 6507022390 On Housing Diff DRV Pinion Gear,For 1st Design Must Use Seal Kit 19179936.2nd Design
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GM GENUINE Fits: all 2005 STS engines 25861283
🇺🇸 US 🇨🇦 CA
5 speed Automatic trans.Can Use Seal Only with Casting # 6457038590 On Housing Diff DRV Pinion Gear,For 1st Design Must Use Seal Kit 19179933.
Fitment notes — GM GENUINE 25861283
5 speed Automatic trans.Can Use Seal Only with Casting # 6457038590 On Housing Diff DRV Pinion Gear,For 1st Design Must Use Seal Kit 19179933.58.98mm2nd Design
Fits:
5 speed Automatic trans.Can Use Seal Only with Casting # 6457038590 On Housing Diff DRV Pinion Gear,For 1st Design Must Use Seal Kit 19179933.58.98mm2nd Designor Trans. Code 4L80-E4 speed Automatic trans.Can Use Seal Only with Casting # 6457038590 On HSG Diff DRV Pinion Gear, For 2nd Design See Seal Kit 19179933 or See 1st Design 1917993558.98mm3rd Design
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WJB / INMOTION PARTS Fits: all 2005 STS engines WS710998
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Rear Outerwith 7.625 IN Ring Gear
Fitment notes — WJB / INMOTION PARTS WS710998
Rear Outerwith 7.625 IN Ring Gearwith Getrag 645 Differential
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WJB / INMOTION PARTS Fits: all 2005 STS engines WS711081
🇺🇸 US 🇨🇦 CA
Front OuterAWD
Fitment notes — WJB / INMOTION PARTS WS711081
Front OuterAWDwith 6.378 IN Ring Gearwith Getrag 650 Transmission
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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 Washer

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 89058604
🇺🇸 US 🇨🇦 CA
Trans. Code 5L50-E5 speed Automatic trans.
Fitment notes — GM GENUINE 89058604
Trans. Code 5L50-E5 speed Automatic trans.3.42 Rear Axle Ratio (GU6), Positraction Limited-Slip Rear Axle (G80)Pinion Gear Thrust Washer
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This table covers the Differential washers.

Drive Shaft

Brand Part Number Markets Notes Buy
DORMAN Popular Fits: all 2005 STS engines 986437
🇺🇸 US 🇨🇦 CA
Length: 57.125"
Fitment notes — DORMAN 986437
Length: 57.125"
RearAWDTrans. code 5L50-EFrom VIN 50206731
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CARDONE Fits: all 2005 STS engines 651003
🇺🇸 US 🇨🇦 CA
FrontAWD
Fitment notes — CARDONE 651003
FrontAWDwith 25.59 (In) Long Driveshaft
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DORMAN Fits: all 2005 STS engines 936130
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Length: 65.25"OE Fix
Fitment notes — DORMAN 936130
Length: 65.25"OE Fix
RearRWD
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DORMAN Fits: all 2005 STS engines 986436
🇺🇸 US 🇨🇦 CA
Length: 57.125"
Fitment notes — DORMAN 986436
Length: 57.125"
RearAWDTrans. code 5L50-ETo VIN 50206730
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DORMAN Fits: all 2005 STS engines 938268
🇺🇸 US 🇨🇦 CA
Length: 25.63"
Fitment notes — DORMAN 938268
Length: 25.63"
FrontAWD
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This table covers the driveshafts that carry torque from the transmission or transfer case.

Drive Shaft Bolt

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 11588658
🇺🇸 US 🇨🇦 CA
FrontM12X1.75X70
Fitment notes — GM GENUINE 11588658
FrontM12X1.75X70HEX
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This table covers the Drive Shaft bolts.

Drive Shaft Center Support Bearing

Economy

Brand Part Number Markets Notes Buy
SKP Popular Fits: all 2005 STS engines SK934610
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
RWD
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DEA / MARMON RIDE CONTROL Fits: all 2005 STS engines A60014
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
MRC Driveline
Fitment notes — DEA / MARMON RIDE CONTROL A60014
MRC Driveline
with 1.1811" Bearing I.D.
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DORMAN Fits: all 2005 STS engines 934610
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
RWD
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WESTAR Fits: all 2005 STS engines DS6503
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Does Not Include Boot or Snap Ring
Fitment notes — WESTAR DS6503
Does Not Include Boot or Snap Ring
Bearings I.D. = 1.181" (30mm)
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WJB / INMOTION PARTS Fits: all 2005 STS engines WCHB3074A
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Bearing, Support
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Standard Replacement

Brand Part Number Markets Notes Buy
GM GENUINE Popular Fits: all 2005 STS engines 19353727
🇺🇸 US 🇨🇦 CA
Center5 speed Automatic trans.
Fitment notes — GM GENUINE 19353727
Center5 speed Automatic trans.Use with 15G LUBRICANT12377985 IN U.S AND 88901242 IN CANADA
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ANCHOR Fits: all 2005 STS engines 6104
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Centerwith 30mm Inside Diameter Bearing(s)
Fitment notes — ANCHOR 6104
Centerwith 30mm Inside Diameter Bearing(s)85mm Centerline Of Bearing To Mounting Facewith 168mm Mountingwith Top Mounting TabsRound Body
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BCA Fits: all 2005 STS engines NBHB3074A
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
RWD
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DANA Fits: all 2005 STS engines 25141646X
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Spicer Select
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SKF Fits: all 2005 STS engines HB3074A
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
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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 Flex Joint

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 19299915
🇺🇸 US 🇨🇦 CA
105MM BOLT CIRCLE DIA, 141MM OD, 35MM THICK
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This table covers the flex joints in the driveshaft.

Drive Shaft Retainer

Brand Part Number Markets Notes Buy
GM GENUINE Fits: all 2005 STS engines 10363385
🇺🇸 US 🇨🇦 CA
FrontM8X1.25X49.5
Fitment notes — GM GENUINE 10363385
FrontM8X1.25X49.5Contains 2 Torx Head Bolts and 1 Curved Flat Washer
Fits:
FrontM8X1.25X49.5Contains 2 Torx Head Bolts and 1 Curved Flat Washeror Trans. Code 4L80-E4 speed Automatic trans.M8X1.25X49.5Contains 2 Torx Head Bolts and 1 Curved Flat Washer
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This table covers the Drive Shaft retainers.

Gear Oil

Brand Part Number Markets Notes Buy
VALVOLINE Popular Fits: all 2005 STS engines VV820
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Daily Protection SAE 75W-90 Gear Oil1 Quart
Fitment notes — VALVOLINE VV820
Daily Protection SAE 75W-90 Gear Oil1 Quart
Fits:
Rear Differential
or:
Front DifferentialAWD
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VALVOLINE Popular Fits: all 2005 STS engines VV975
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart
Fitment notes — VALVOLINE VV975
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart
Fits:
Rear Differential
or:
Front DifferentialAWD
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VALVOLINE Fits: all 2005 STS engines 889785
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
Fitment notes — VALVOLINE 889785
Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
Fits:
Rear Differential
or:
Front DifferentialAWD
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VALVOLINE Fits: all 2005 STS engines 882505
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon
Fitment notes — VALVOLINE 882505
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon
Fits:
Rear Differential
or:
Front DifferentialAWD
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VALVOLINE Fits: all 2005 STS engines 723856
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon
Fitment notes — VALVOLINE 723856
Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon
Fits:
Rear Differential
or:
Front DifferentialAWD
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VALVOLINE Fits: all 2005 STS engines VV822
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Daily Protection SAE 75W-90 Gear Oil16 Gallon KEG
Fitment notes — VALVOLINE VV822
Daily Protection SAE 75W-90 Gear Oil16 Gallon KEG
Fits:
Rear Differential
or:
Front DifferentialAWD
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 Drive Chain

Brand Part Number Markets Notes Buy
USA STANDARD GEAR Fits: all 2005 STS engines ZTCHHV080
🇺🇸 US
BW447637 Links, 1-1/2 Inch Wide
View on
Amazon

This table covers the chains that drive the transfer case.

Transfer Case Fluid

Dexron

Brand Part Number Markets Notes Buy
VALVOLINE Popular Fits: all 2005 STS engines 798153
🇺🇸 US 🇨🇦 CA
Dexron III / Mercon ATF1 Quart
Fitment notes — VALVOLINE 798153
Dexron III / Mercon ATF1 Quart
AWD
View on
Amazon
VALVOLINE Fits: all 2005 STS engines 822405
🇺🇸 US 🇨🇦 CA
Dexron VI/Mercon LV ATF1 Quart
Fitment notes — VALVOLINE 822405
Dexron VI/Mercon LV ATF1 Quart
AWD
View on
Amazon
VALVOLINE Fits: all 2005 STS engines 773636
🇺🇸 US 🇨🇦 CA
Dexron III / Mercon ATF1 Gallon
Fitment notes — VALVOLINE 773636
Dexron III / Mercon ATF1 Gallon
AWD
View on
Amazon
VALVOLINE Fits: all 2005 STS engines 883572
🇺🇸 US 🇨🇦 CA
Dexron VI/Mercon LV ATF1 Gallon
Fitment notes — VALVOLINE 883572
Dexron VI/Mercon LV ATF1 Gallon
AWD
View on
Amazon
VALVOLINE Fits: all 2005 STS engines VV349
🇺🇸 US 🇨🇦 CA
Dexron III / Mercon ATF5 Gallon Pail
Fitment notes — VALVOLINE VV349
Dexron III / Mercon ATF5 Gallon Pail
AWD
View on
Amazon

Mercon

Brand Part Number Markets Notes Buy
VALVOLINE Fits: all 2005 STS engines 822345
🇺🇸 US 🇨🇦 CA
Mercon V ATF1 Quart
Fitment notes — VALVOLINE 822345
Mercon V ATF1 Quart
AWD
View on
Amazon

Multi-Vehicle

Brand Part Number Markets Notes Buy
VALVOLINE Popular Fits: all 2005 STS engines VV3246
🇺🇸 US 🇨🇦 CA
Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Quart
Fitment notes — VALVOLINE VV3246
Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 QuartDEXRON VI, MERCON LV, DEX/MERC
AWD
View on
Amazon
VALVOLINE Popular Fits: all 2005 STS engines 773775
🇺🇸 US 🇨🇦 CA
Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Gallon
Fitment notes — VALVOLINE 773775
Max Life Multi-Vehicle or Maxlife Multi-Vehicle Full Synthetic ATF1 Gallon
AWD
View on
Amazon
LUCAS OIL Fits: all 2005 STS engines 10052
🇺🇸 US 🇨🇦 CA
SURE-SHIFT SEMI-SYNTHETIC AUTOMATIC TRANSMISSION FLUID1 qt
Fitment notes — LUCAS OIL 10052
SURE-SHIFT SEMI-SYNTHETIC AUTOMATIC TRANSMISSION FLUID1 qt
AWD
View on
Amazon
LUCAS OIL Fits: all 2005 STS engines 10418
🇺🇸 US 🇨🇦 CA
FULL SYNTHETIC MULTI-VEHICLE AUTOMATIC TRANSMISSION FLUID1 qt
Fitment notes — LUCAS OIL 10418
FULL SYNTHETIC MULTI-VEHICLE AUTOMATIC TRANSMISSION FLUID1 qt
AWD
View on
Amazon
LUCAS OIL Fits: all 2005 STS engines 18007
🇺🇸 US 🇨🇦 CA
Full Synthetic Multi-Vehicle Automatic Transmission Fluid6 Gallon
Fitment notes — LUCAS OIL 18007
Full Synthetic Multi-Vehicle Automatic Transmission Fluid6 Gallon
AWD
View on
Amazon
VALVOLINE Fits: all 2005 STS engines 881051
🇺🇸 US 🇨🇦 CA
Maxlife Multi-Vehicle Full Synthetic ATF5 Gallon Bay Box
Fitment notes — VALVOLINE 881051
Maxlife Multi-Vehicle Full Synthetic ATF5 Gallon Bay Box
AWD
View on
Amazon

Type III (H)

Brand Part Number Markets Notes Buy
ACDELCO Fits: all 2005 STS engines 109240
🇺🇸 US
1 Quart
Fitment notes — ACDELCO 109240
1 Quart
AWD
View on
Amazon
ACDELCO Fits: all 2005 STS engines 109241
🇺🇸 US
1 Gallon
Fitment notes — ACDELCO 109241
1 Gallon
AWD
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 Gasket

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 4.6L V8 24231525
🇺🇸 US 🇨🇦 CA
Trans. code 4L80-E4 speed Automatic trans.
View on
Amazon

This table covers the gaskets that seal the Transfer Case. 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.

Transfer Case Input Shaft Bearing

Brand Part Number Markets Notes Buy
SKF Popular Fits: all 2005 STS engines 6010J
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
View on
Amazon
BCA Fits: all 2005 STS engines NB110
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
with Borg Warner 4479 Transfer Casewith Full Time 4WD
Fitment notes — BCA NB110
with Borg Warner 4479 Transfer Casewith Full Time 4WDwith 1 Speed Transfer Case
View on
Amazon
GM GENUINE Fits: 4.6L V8 15580230
🇺🇸 US 🇨🇦 CA
Trans. code 4L80-E4 speed Automatic trans.
Fitment notes — GM GENUINE 15580230
Trans. code 4L80-E4 speed Automatic trans.BORG-WARNER
View on
Amazon
NATIONAL Fits: all 2005 STS engines 110
🇺🇸 US 🇨🇦 CA
AWDwith Borg-Warner 4479 Transfer Case
Fitment notes — NATIONAL 110
AWDwith Borg-Warner 4479 Transfer Case1 Speed
View on
Amazon
SCHAEFFLER Fits: all 2005 STS engines 6010
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
1.969 In Inside Diameter X 3.15 In Outside Diameter X 0.63 In Thick
View on
Amazon
WJB / INMOTION PARTS Fits: all 2005 STS engines RB6010
🇺🇸 US 🇨🇦 CA
AWDwith Borg-Warner 4479 Transfer Case
Fitment notes — WJB / INMOTION PARTS RB6010
AWDwith Borg-Warner 4479 Transfer Case1 Speed
View on
Amazon

This table covers the Transfer Case Input 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 Input Shaft Repair Sleeve

Brand Part Number Markets Notes Buy
BCA Fits: 3.6L V6 NS99196
🇺🇸 US 🇨🇦 CA
AWDwith Borg Warner 4479 Transfer Case
Fitment notes — BCA NS99196
AWDwith Borg Warner 4479 Transfer Casewith Full Time 4WDwith 1 Speed Transfer Case
View on
Amazon
NATIONAL Fits: 3.6L V6 99196
🇺🇸 US 🇨🇦 CA
AWDwith Borg-Warner 4479 Transfer Case
Fitment notes — NATIONAL 99196
AWDwith Borg-Warner 4479 Transfer Case1 Speed
View on
Amazon
SKF Fits: 3.6L V6 99199
🇺🇸 US 🇨🇦 CA
Shaft Diameter: 2.000 In
View on
Amazon
WJB / INMOTION PARTS Fits: 3.6L V6 WS99196
🇺🇸 US 🇨🇦 CA
AWDwith Borg-Warner 4479 Transfer Case
Fitment notes — WJB / INMOTION PARTS WS99196
AWDwith Borg-Warner 4479 Transfer Case1 Speed
View on
Amazon

This table covers the wear sleeves used to restore a Transfer Case Input Shaft seal surface.

Transfer Case Input Shaft Seal

Brand Part Number Markets Notes Buy
GM GENUINE Popular Fits: 3.6L V6 88996656
🇺🇸 US 🇨🇦 CA
View on
Amazon
NATIONAL Popular Fits: 3.6L V6 710651
🇺🇸 US 🇨🇦 CA
AWD
View on
Amazon
BCA Fits: 3.6L V6 NS710651
🇺🇸 US 🇨🇦 CA
with Borg Warner 4479 Transfer Casewith Full Time 4WD
Fitment notes — BCA NS710651
with Borg Warner 4479 Transfer Casewith Full Time 4WDwith 1 Speed Transfer Case
View on
Amazon
SKF Fits: 3.6L V6 20010
🇺🇸 US 🇨🇦 CA
View on
Amazon
USA STANDARD GEAR Fits: 3.6L V6 ZTSEA1900044028
🇺🇸 US
FrontBW4476 Transfer Case, Input Shaft Seal
View on
Amazon
WJB / INMOTION PARTS Fits: 3.6L V6 WS710651
🇺🇸 US 🇨🇦 CA
AWD
View on
Amazon

This table covers the seals at the Transfer Case Input 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 Output Shaft Bearing

Economy

Brand Part Number Markets Notes Buy
WJB / INMOTION PARTS Popular Fits: 3.6L V6 RB6206
🇺🇸 US 🇨🇦 CA
Front OuterAWD
Fitment notes — WJB / INMOTION PARTS RB6206
Front OuterAWDwith Borg-Warner 4479 Transfer Case1 Speed
View on
Amazon
WJB / INMOTION PARTS Fits: 3.6L V6 RB6009
🇺🇸 US 🇨🇦 CA
Front InnerAWD
View on
Amazon

Standard Replacement

Brand Part Number Markets Notes Buy
BCA Popular Fits: 3.6L V6 NB206
🇺🇸 US 🇨🇦 CA
Front Outerwith Borg Warner 4479 Transfer Case
Fitment notes — BCA NB206
Front Outerwith Borg Warner 4479 Transfer Casewith Full Time 4WDwith 1 Speed Transfer Case
View on
Amazon
BCA Fits: 3.6L V6 NB109
🇺🇸 US 🇨🇦 CA
Front Innerwith Borg Warner 4479 Transfer Case
Fitment notes — BCA NB109
Front Innerwith Borg Warner 4479 Transfer Casewith Full Time 4WDwith 1 Speed Transfer Case
View on
Amazon
NATIONAL Fits: 3.6L V6 206
🇺🇸 US 🇨🇦 CA
Front OuterAWD
Fitment notes — NATIONAL 206
Front OuterAWDwith Borg-Warner 4479 Transfer Case1 SpeedSingle Lip Style
View on
Amazon
NATIONAL Fits: 3.6L V6 109
🇺🇸 US 🇨🇦 CA
Front InnerAWD
Fitment notes — NATIONAL 109
Front InnerAWDwith Borg-Warner 4479 Transfer Case1 Speed
View on
Amazon
SCHAEFFLER Fits: 3.6L V6 6206
🇺🇸 US 🇨🇦 CA
Bearing & Race Set
Fitment notes — SCHAEFFLER 6206
Bearing & Race Set
Fits:
Front Forward30 MM Inside Diameter X 62 mm Outside Diameter X 16 MM Thick
or:
Front Inner30 MM Inside Diameter X 62 mm Outside Diameter X 16 MM Thick
or:
Front Outer30 MM Inside Diameter X 62 mm Outside Diameter X 16 MM Thick
or:
Front30 MM Inside Diameter X 62 mm Outside Diameter X 16 MM Thick
or:
Rear Inner30 MM Inside Diameter X 62 mm Outside Diameter X 16 MM Thick
or:
Rear Outer30 MM Inside Diameter X 62 mm Outside Diameter X 16 MM Thick
or:
Rear30 MM Inside Diameter X 62 mm Outside Diameter X 16 MM Thick
or:
Right30 MM Inside Diameter X 62 mm Outside Diameter X 16 MM Thick
View on
Amazon
SKF Fits: 3.6L V6 6206J
🇺🇸 US 🇨🇦 CA
Front Forward
View on
Amazon
SKF Fits: 3.6L V6 6009J
🇺🇸 US 🇨🇦 CA
Rear Forward
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 Bushing

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 3.6L V6 19168733
🇺🇸 US 🇨🇦 CA
View on
Amazon

This table covers the Transfer Case Output Shaft 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 Output Shaft Repair Sleeve

Brand Part Number Markets Notes Buy
BCA Fits: 3.6L V6 NS99189
🇺🇸 US 🇨🇦 CA
Fits Rear
Fitment notes — BCA NS99189
Fits:
Rear
or:
Front
View on
Amazon
NATIONAL Fits: 3.6L V6 99189
🇺🇸 US 🇨🇦 CA
Fits FrontAWD
Fitment notes — NATIONAL 99189
Fits:
FrontAWDwith Borg-Warner 4479 Transfer Case1 Speed
or:
RearAWDwith Borg-Warner 4479 Transfer Case1 Speed
View on
Amazon
WJB / INMOTION PARTS Fits: 3.6L V6 WS99189
🇺🇸 US 🇨🇦 CA
Fits FrontAWD
Fitment notes — WJB / INMOTION PARTS WS99189
Fits:
FrontAWDwith Borg-Warner 4479 Transfer Case1 Speed
or:
RearAWDwith Borg-Warner 4479 Transfer Case1 Speed
View on
Amazon

This table covers the wear sleeves used to restore a Transfer Case Output Shaft seal surface.

Transfer Case Output Shaft Seal

Brand Part Number Markets Notes Buy
SKF Popular Fits: 3.6L V6 18892
🇺🇸 US 🇨🇦 CA
Fits Rear
Fitment notes — SKF 18892
Fits:
Rear
or:
Front
View on
Amazon
BCA Fits: 3.6L V6 NS710661
🇺🇸 US 🇨🇦 CA
Fits Front
Fitment notes — BCA NS710661
Fits:
Front
or:
Rearwith Borg Warner 4479 Transfer Casewith Full Time 4WDwith 1 Speed Transfer Case
View on
Amazon
GM GENUINE Fits: 3.6L V6 88996657
🇺🇸 US 🇨🇦 CA
Fits Rear
Fitment notes — GM GENUINE 88996657
Fits:
Rear
or:
Front
View on
Amazon
SCHAEFFLER Fits: 3.6L V6 SS2949
🇺🇸 US 🇨🇦 CA
Fits Rearwithout Boot On Seal
Fitment notes — SCHAEFFLER SS2949
Fits:
Rearwithout Boot On Seal47.981 mm Shaft Diameter
or:
Frontwithout Boot On Seal47.981 mm Shaft Diameter
View on
Amazon
WJB / INMOTION PARTS Fits: 3.6L V6 WS710661
🇺🇸 US 🇨🇦 CA
Fits FrontAWD
Fitment notes — WJB / INMOTION PARTS WS710661
Fits:
FrontAWD
or:
RearAWD
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 Overhaul Kit

Brand Part Number Markets Notes Buy
USA STANDARD GEAR Fits: 3.6L V6 ZTBK4476
🇺🇸 US 🇨🇦 CA
Transfer Case Bearing and Seal Overhaul Kit
Fitment notes — USA STANDARD GEAR ZTBK4476
Transfer Case Bearing and Seal Overhaul Kit
Fits:
AWDBW4476, aluminum case, chain drive, single speedor AWDBW4476/BW4479, aluminum case, chain drive, single speed
View on
Amazon

This table covers the Transfer Case Overhaul kits.

Transfer Case Planetary Carrier

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 3.6L V6 19210917
🇺🇸 US 🇨🇦 CA
Axle Shaft Spline Quantity: 38
View on
Amazon

This table covers the planetary carriers in the transfer case.

Transfer Case Shift Shaft Seal

Brand Part Number Markets Notes Buy
BCA Fits: 3.6L V6 NS330385
🇺🇸 US 🇨🇦 CA
AWDwith Borg Warner 4479 Transfer Case
Fitment notes — BCA NS330385
AWDwith Borg Warner 4479 Transfer Casewith Full Time 4WDwith 1 Speed Transfer Case
View on
Amazon
NATIONAL Fits: 3.6L V6 330385
🇺🇸 US 🇨🇦 CA
AWDwith Borg-Warner 4479 Transfer Case
Fitment notes — NATIONAL 330385
AWDwith Borg-Warner 4479 Transfer Case1 Speed
View on
Amazon
WJB / INMOTION PARTS Fits: 3.6L V6 WS330385
🇺🇸 US 🇨🇦 CA
AWDwith Borg-Warner 4479 Transfer Case
Fitment notes — WJB / INMOTION PARTS WS330385
AWDwith Borg-Warner 4479 Transfer Case1 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 Vent

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 3.6L V6 19180066
🇺🇸 US 🇨🇦 CA
SINGLE USE
View on
Amazon

This table covers the vents on the transfer case.

Buying Drivetrain Parts for a 2005 Cadillac STS

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: CV Axle and Transfer Case Fluid .

Frequently Asked Questions

How many drivetrain parts fit the 2005 Cadillac STS?

Our catalog currently lists 138 drivetrain parts for the 2005 Cadillac STS across 36 subcategories and 24 brands, covering both the 3.6L V6 and the 4.6L V8. Each part is matched to the engine(s) it fits.

Do drivetrain parts differ between 2005 Cadillac STS engines?

Some do. 95 parts fit every engine; the other 43 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 2005 Cadillac STS?

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 2005 Cadillac STS 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 2005 Cadillac STS?

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 2005 Cadillac STS

Drivetrain Parts for Other Cadillac STS Years

Switch vehicle or jump to a subcategory

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.