2006 Cadillac STS Drivetrain Parts

Engine:

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

This page lists 86 drivetrain parts for the 2006 Cadillac STS, across 27 part types, covering both the 3.6L V6 and the 4.4L V8 Supercharged. Every part shows its brand, manufacturer part number and fitment notes.

On the 2006 Cadillac STS, the drivetrain system moves power from transmission to wheels through axles, CV joints, driveshafts, differentials and wheel-end hardware. 29 parts of the 86 listed are CV Axle (16 parts), Axle Shaft Seal (7 parts) and Differential Pinion Bearing / Race (6 parts). The other 24 part types cover the remaining 57 parts.

Axle Intermediate Shaft Seal

Brand Part Number Markets Notes Buy
TIMKEN Fits: 3.6L V6 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: 3.6L V6 90223082
🇺🇸 US 🇨🇦 CA
Fits Rear5 speed Automatic trans.
Fitment notes — GM GENUINE 90223082
Fits:
Rear5 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)
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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 2006 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
RearOutside Diameter of Lip
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NATIONAL Popular Fits: all 2006 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: 3.6L V6 710853
🇺🇸 US 🇨🇦 CA
FrontAWD
Fitment notes — NATIONAL 710853
FrontAWDwith 6.378 IN Ring Gearwith Getrag 650 Transmission
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SKF Fits: all 2006 STS engines 12720
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Front Left
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TIMKEN Fits: all 2006 STS engines 223240
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Fits Rear
Fitment notes — TIMKEN 223240
Fits:
Rear
or:
Front RightAWDFrom 2009 To 2011Rear
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WJB / INMOTION PARTS Fits: 3.6L V6 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 2006 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: 3.6L V6 70091
🇺🇸 US 🇨🇦 CA
Rear LeftAWD
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CARDONE Fits: 3.6L V6 601416
🇺🇸 US 🇨🇦 CA
Remanufactured
Fitment notes — CARDONE 601416
Remanufactured
Front RightAWD
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CARDONE Fits: 3.6L V6 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: 3.6L V6 GM8387
🇺🇸 US 🇨🇦 CA
Front LeftAWD
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APWI Popular Fits: 3.6L V6 GM8388
🇺🇸 US 🇨🇦 CA
Front RightAWD
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CARDONE Fits: 3.6L V6 661454
🇺🇸 US 🇨🇦 CA
Rear LeftAWD
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GSP Fits: 3.6L V6 NCV17001
🇺🇸 US 🇨🇦 CA
Rear LeftAWD
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TOP NOTCH Fits: 3.6L V6 TN20120
🇺🇸 US 🇨🇦 CA
Rear LeftAWD
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TRAKMOTIVE Fits: 3.6L V6 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: 3.6L V6 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: 3.6L V6 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: 3.6L V6 GM8212
🇺🇸 US 🇨🇦 CA
Does Not Include ABS Ring
Fitment notes — TRAKMOTIVE GM8212
Does Not Include ABS Ring
Front LeftAWD
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Brand Part Number Markets Notes Buy
GSP Fits: 4.4L V8 Supercharged NCV17001
🇺🇸 US 🇨🇦 CA
Rear Left
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TOP NOTCH Fits: 4.4L V8 Supercharged TN20120
🇺🇸 US 🇨🇦 CA
Rear Left
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TRAKMOTIVE Fits: 4.4L V8 Supercharged GM8224
🇺🇸 US 🇨🇦 CA
Does Not Include ABS Ring
Fitment notes — TRAKMOTIVE GM8224
Does Not Include ABS Ring
Rear Left
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TRAKMOTIVE Fits: 4.4L V8 Supercharged GM8225
🇺🇸 US 🇨🇦 CA
Does Not Include ABS Ring
Fitment notes — TRAKMOTIVE GM8225
Does Not Include ABS Ring
Rear Right
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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 2006 STS engines DX515
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Front Inner
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MEVOTECH Fits: all 2006 STS engines DX437
🇺🇸 US 🇨🇦 CA 🇲🇽 MX
Front Outer
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MEVOTECH Fits: all 2006 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 2006 STS engines 11561300
🇺🇸 US 🇨🇦 CA
M14X2X101
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GM GENUINE Fits: all 2006 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 2006 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 Cover Bolt

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 4.4L V8 Supercharged 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: 4.4L V8 Supercharged 19256069
🇺🇸 US 🇨🇦 CA
Includes Seal
Fitment notes — GM GENUINE 19256069
Includes Seal
Rear 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: 4.4L V8 Supercharged NBNP922169
🇺🇸 US 🇨🇦 CA
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: 4.4L V8 Supercharged NBA67
🇺🇸 US 🇨🇦 CA
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: 4.4L V8 Supercharged NBNP233028
🇺🇸 US 🇨🇦 CA
Race
Fitment notes — BCA NBNP233028
Race
Rear Innerwith Getrag 645 Axle(S)with 4.378 IN Ring Gear
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NATIONAL Fits: 4.4L V8 Supercharged NP233028
🇺🇸 US 🇨🇦 CA
Race
Fitment notes — NATIONAL NP233028
Race
Rear Innerwith 4.378 IN Ring Gearwith Getrag 645 Axle
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NATIONAL Fits: 4.4L V8 Supercharged NP922169
🇺🇸 US 🇨🇦 CA
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: 4.4L V8 Supercharged A67
🇺🇸 US 🇨🇦 CA
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: 4.4L V8 Supercharged 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: 4.4L V8 Supercharged 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: 4.4L V8 Supercharged 19179934
🇺🇸 US 🇨🇦 CA
Includes Flange (86mm), Seal, and Nut
Fitment notes — GM GENUINE 19179934
Includes Flange (86mm), Seal, and Nut
6 speed Automatic trans.Use without Casting Number 6457038590 On Housing Diff DRV Pinion Gear, For 2nd Design Seal Serviced Separately See 25861283.3.23 Ratio (GU5)1st Design
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This table covers the flanges that connect the driveshaft to the differential pinion.

Differential Pinion Repair Sleeve

Brand Part Number Markets Notes Buy
BCA Fits: 4.4L V8 Supercharged NS99215
🇺🇸 US 🇨🇦 CA
Front Outerwith 650 Transmission Code
Fitment notes — BCA NS99215
Front Outerwith 650 Transmission Codewith 6.378 IN Ring GearGetrag 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
GM GENUINE Fits: 4.4L V8 Supercharged 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: 4.4L V8 Supercharged 25861283
🇺🇸 US 🇨🇦 CA
6 speed Automatic trans.Can Use Seal Only with Casting # 6457038590 On Housing Diff DRV Pinion Gear,For 1st Design Must Use Seal Kit 19179934.
Fitment notes — GM GENUINE 25861283
6 speed Automatic trans.Can Use Seal Only with Casting # 6457038590 On Housing Diff DRV Pinion Gear,For 1st Design Must Use Seal Kit 19179934.58.98mm3.23 Rear Axle Ratio (GU5)2nd Design
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NATIONAL Fits: 4.4L V8 Supercharged 710998
🇺🇸 US 🇨🇦 CA
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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WJB / INMOTION PARTS Fits: 4.4L V8 Supercharged WS710998
🇺🇸 US 🇨🇦 CA
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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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.

Drive Shaft

Brand Part Number Markets Notes Buy
DORMAN Fits: 4.4L V8 Supercharged 966509
🇺🇸 US 🇨🇦 CA
Length: 61.125"
Fitment notes — DORMAN 966509
Length: 61.125"
Rear
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ULTRA-POWER Fits: 4.4L V8 Supercharged 938268
🇺🇸 US 🇨🇦 CA
25.63" Long
Fitment notes — ULTRA-POWER 938268
25.63" Long
Front4WD/AWD
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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: 4.4L V8 Supercharged 11588658
🇺🇸 US 🇨🇦 CA
Fits FrontM12X1.75X70
Fitment notes — GM GENUINE 11588658
Fits:
FrontM12X1.75X70HEX
or:
RearM12X1.75X70HEX
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This table covers the Drive Shaft bolts.

Drive Shaft Center Support Bearing

Economy

Brand Part Number Markets Notes Buy
DEA / MARMON RIDE CONTROL Fits: 4.4L V8 Supercharged A60014
🇺🇸 US 🇨🇦 CA
MRC Driveline
Fitment notes — DEA / MARMON RIDE CONTROL A60014
MRC Driveline
with 1.1811" Bearing I.D.
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WESTAR Fits: 4.4L V8 Supercharged DS6503
🇺🇸 US 🇨🇦 CA
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: 4.4L V8 Supercharged WCHB3074A
🇺🇸 US 🇨🇦 CA
Bearing, Support
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Standard Replacement

Brand Part Number Markets Notes Buy
DANA Popular Fits: 4.4L V8 Supercharged 25141646X
🇺🇸 US 🇨🇦 CA
Spicer Select
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SKF Popular Fits: 4.4L V8 Supercharged HB3074A
🇺🇸 US 🇨🇦 CA
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ANCHOR Fits: 4.4L V8 Supercharged 6104
🇺🇸 US 🇨🇦 CA
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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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.

Gear Oil

Brand Part Number Markets Notes Buy
VALVOLINE Popular Fits: 4.4L V8 Supercharged VV820
🇺🇸 US 🇨🇦 CA
Daily Protection SAE 75W-90 Gear Oil1 Quart
Fitment notes — VALVOLINE VV820
Daily Protection SAE 75W-90 Gear Oil1 Quart
Rear Differential
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VALVOLINE Popular Fits: 4.4L V8 Supercharged VV975
🇺🇸 US 🇨🇦 CA
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart
Fitment notes — VALVOLINE VV975
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Quart
Rear Differential
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VALVOLINE Fits: 4.4L V8 Supercharged 889785
🇺🇸 US 🇨🇦 CA
Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
Fitment notes — VALVOLINE 889785
Full Synthetic SAE 75W-90 Gear Oil1 Quart Flex Fill
Rear Differential
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VALVOLINE Fits: 4.4L V8 Supercharged 882505
🇺🇸 US 🇨🇦 CA
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon
Fitment notes — VALVOLINE 882505
Advanced Full Synthetic SAE 75W-90 Gear Oil1 Gallon
Rear Differential
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VALVOLINE Fits: 4.4L V8 Supercharged 723856
🇺🇸 US 🇨🇦 CA
Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon
Fitment notes — VALVOLINE 723856
Advanced Full Synthetic SAE 75W-90 Gear Oil5 Gallon
Rear Differential
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VALVOLINE Fits: 4.4L V8 Supercharged VV822
🇺🇸 US 🇨🇦 CA
Daily Protection SAE 75W-90 Gear Oil16 Gallon KEG
Fitment notes — VALVOLINE VV822
Daily Protection SAE 75W-90 Gear Oil16 Gallon KEG
Rear Differential
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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: 4.4L V8 Supercharged ZTCHHV080
🇺🇸 US
BW447637 Links, 1-1/2 Inch Wide
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This table covers the chains that drive the transfer case.

Transfer Case Input Shaft Bearing

Brand Part Number Markets Notes Buy
BCA Fits: 4.4L V8 Supercharged NB110
🇺🇸 US 🇨🇦 CA
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
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NATIONAL Fits: 4.4L V8 Supercharged 110
🇺🇸 US 🇨🇦 CA
with Borg-Warner 4479 Transfer Case1 Speed trans.
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SCHAEFFLER Fits: 4.4L V8 Supercharged 6010
🇺🇸 US 🇨🇦 CA
1.969 In Inside Diameter X 3.15 In Outside Diameter X 0.63 In Thick
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SKF Fits: 4.4L V8 Supercharged 6010J
🇺🇸 US 🇨🇦 CA
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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
SKF Fits: 4.4L V8 Supercharged 99199
🇺🇸 US 🇨🇦 CA
Shaft Diameter: 2.000 In
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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
BCA Fits: 4.4L V8 Supercharged 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
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GM GENUINE Fits: 4.4L V8 Supercharged 88996656
🇺🇸 US 🇨🇦 CA
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SKF Fits: 4.4L V8 Supercharged 20010
🇺🇸 US 🇨🇦 CA
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USA STANDARD GEAR Fits: 4.4L V8 Supercharged ZTSEA1900044028
🇺🇸 US
FrontBW4476 Transfer Case, Input Shaft Seal
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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

Brand Part Number Markets Notes Buy
BCA Popular Fits: 4.4L V8 Supercharged 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
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BCA Fits: 4.4L V8 Supercharged 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
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SCHAEFFLER Fits: 4.4L V8 Supercharged 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
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SKF Fits: 4.4L V8 Supercharged 6206J
🇺🇸 US 🇨🇦 CA
Front Forward
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SKF Fits: 4.4L V8 Supercharged 6009J
🇺🇸 US 🇨🇦 CA
Rear Forward
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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: 4.4L V8 Supercharged 19168733
🇺🇸 US 🇨🇦 CA
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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: 4.4L V8 Supercharged NS99189
🇺🇸 US 🇨🇦 CA
Fits Rear
Fitment notes — BCA NS99189
Fits:
Rear
or:
Front
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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
BCA Fits: 4.4L V8 Supercharged NS710661
🇺🇸 US 🇨🇦 CA
Fits Rearwith Borg Warner 4479 Transfer Case
Fitment notes — BCA NS710661
Fits:
Rearwith Borg Warner 4479 Transfer Casewith Full Time 4WDwith 1 Speed Transfer Case
or:
Frontwith Borg Warner 4479 Transfer Casewith Full Time 4WDwith 1 Speed Transfer Case
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GM GENUINE Fits: 4.4L V8 Supercharged 88996657
🇺🇸 US 🇨🇦 CA
Fits Rear
Fitment notes — GM GENUINE 88996657
Fits:
Rear
or:
Front
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SCHAEFFLER Fits: 4.4L V8 Supercharged 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
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SKF Fits: 4.4L V8 Supercharged 18892
🇺🇸 US 🇨🇦 CA
Fits Rear
Fitment notes — SKF 18892
Fits:
Rear
or:
Front
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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 Planetary Carrier

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 4.4L V8 Supercharged 19210917
🇺🇸 US 🇨🇦 CA
Axle Shaft Spline Quantity: 38
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This table covers the planetary carriers in the transfer case.

Transfer Case Vent

Brand Part Number Markets Notes Buy
GM GENUINE Fits: 4.4L V8 Supercharged 19180066
🇺🇸 US 🇨🇦 CA
SINGLE USE
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GM GENUINE Fits: 4.4L V8 Supercharged 25892279
🇺🇸 US 🇨🇦 CA
Vent Stem with Cap
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This table covers the vents on the transfer case.

Buying Drivetrain Parts for a 2006 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 Axle Shaft Seal .

Frequently Asked Questions

How many drivetrain parts fit the 2006 Cadillac STS?

Our catalog currently lists 86 drivetrain parts for the 2006 Cadillac STS across 27 subcategories and 22 brands, covering both the 3.6L V6 and the 4.4L V8 Supercharged. Each part is matched to the engine(s) it fits.

Do drivetrain parts differ between 2006 Cadillac STS engines?

Some do. 11 parts fit every engine; the other 75 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 2006 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 2006 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 2006 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 2006 Cadillac STS

Drivetrain Parts for Other Cadillac STS 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.