How to replace oil seals in a transmission?

Oil leaks frequently occur due to wear of the extension housing oil seal and bushing (if equipped), or the speedometer drive gear oil seal and o-ring. Replacement of these seals is relatively easy since the repairs can usually be performed without removing the transmission from the vehicle. The extension housing oil seal is located at the extreme rear of the transmission, where the driveshaft is attached. If leakage at the seal is suspected, raise the vehicle and support it securely on jack stands. If the seal is leaking, transmission lubricant will be built up on the front of the driveshaft and may be dripping from the rear of the transmission. To remove the oil seal and bushing, remove the driveshaft and carefully tap the dust shield (if equipped) to the rear and remove it from the transmission. On cast iron case (heavy duty) five-speed manual transmissions, remove the nut and U-joint flange. Using a screwdriver or seal removal tool, carefully pry the oil seal and bushing (if equipped) out of the rear of the transmission, being careful not to damage the splines on the transmission output shaft. If the oil seal and bushing cannot be removed with a screwdriver or pry bar, a special oil seal removal tool will be required. To install the new oil seal and bushing, use a large section of pipe or a very large deep socket as a drift and drive it into the bore squarely, making sure it's completely seated. Install a new bushing using the same method. Reinstall the U-joint flange and nut (if equipped) and tighten the nut to the torque specifications. Reinstall the dust shield (if equipped) by carefully tapping it into place. Finally, lubricate the splines of the transmission output shaft and the outside of the driveshaft sleeve yoke with lightweight grease, then install the driveshaft, being careful not to damage the lip of the new seal.

Genuine GMC Sonoma Transfer Case Seal

Transfer Case Output Shaft Seal

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24 Transfer Case Seals found

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GMC Sonoma Seal,Transfer Case Rear Output Shaft
Part Number: 12547638
$72.08 MSRP: $125.45
You Save: $53.37 (43%)
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Product Specifications
- Other Name: SEAL, Transfer Case; Extension Seal, Output Shaft Seal
- Position: Rear
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 6 Cyl 4.3L
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GMC Sonoma Seal,Transfer Case Adapter
Part Number: 15969051
$7.27 MSRP: $12.04
You Save: $4.77 (40%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: SEAL, Transfer Case
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 6 Cyl 4.3L
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GMC Sonoma Seal,Transfer Case Rear Output Shaft
Part Number: 15661460
$25.33 MSRP: $41.94
You Save: $16.61 (40%)
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Product Specifications
- Other Name: SEAL, Transfer Case; Extension Seal
- Position: Rear
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1993-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal,Propeller Shaft Front Slip Yoke Oil(Booted)
Part Number: 24232325
$13.92 MSRP: $23.03
You Save: $9.11 (40%)
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Product Specifications
- Other Name: SEAL, Rear Bearing Retaining; Extension Housing Seal
- Position: Front
- Replaces: 24201470
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1995-2003 GMC Sonoma | PICKUP | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 6 Cyl 4.3L
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GMC Sonoma Seal,Transfer Case Input Shaft
Part Number: 12547466
$49.85 MSRP: $82.52
You Save: $32.67 (40%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SEAL, Transfer Case
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1998-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 6 Cyl 4.3L
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GMC Sonoma Seal,Propeller Shaft Front Slip Yoke Oil
Part Number: 8673526
$6.53 MSRP: $10.80
You Save: $4.27 (40%)
Ships in 1 Business Day
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Product Specifications
- Other Name: SEAL, Transmission Rear Main Bearing; Extension Housing Seal
- Position: Front
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2000 GMC Sonoma | PICKUP | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 6 Cyl 4.3L
- 1991-1994 GMC Sonoma | PICKUP | 4 Cyl 2.2L, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal,Main Shaft
Part Number: 12549329
$11.20 MSRP: $17.85
You Save: $6.65 (38%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SEAL, Transmission Extension; Extension Housing Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1996-2003 GMC Sonoma | PICKUP | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 6 Cyl 4.3L
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GMC Sonoma Seal,Transfer Case Input Shaft
Part Number: 14095609
$15.64 MSRP: $24.61
You Save: $8.97 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SEAL, Transfer Case; Output Shaft Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal,Automatic Transmission Case Extension
Part Number: 1358899
$2.62 MSRP: $4.09
You Save: $1.47 (36%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: SEAL, Transfer Case
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1997 GMC Sonoma | PICKUP | 4 Cyl 2.2L, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal,Transfer Case (Shaft To Yoke)
Part Number: 12544077
$13.05
ADD TO CART
Product Specifications
- Other Name: SEAL, Transfer Case
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 6 Cyl 4.3L
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GMC Sonoma Seal,Transfer Case Oil Pump
Part Number: 14095611
$7.26 MSRP: $11.42
You Save: $4.16 (37%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: SEAL, Transfer Case
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal, Transfer Case Range Sector & Shaft Oil (Free Of Asbestos)
Part Number: 14095598
Product Specifications
- Other Name: SEAL, Transfer Case
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal,Transfer Case Shift Detent Plunger Plug(O Ring)
Part Number: 14071849
Product Specifications
- Other Name: SEAL, Transfer Case
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
View related parts
GMC Sonoma Seal,Transfer Case
Part Number: 15634037
Product Specifications
- Other Name: SEAL, Transfer Case
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991 GMC Sonoma | PICKUP | 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal, Transfer Case
Part Number: 1167922
Product Specifications
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1995 GMC Sonoma | PICKUP | 4 Cyl 2.2L, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal,Trfr Case Rear Output
Part Number: 15636576
Product Specifications
- Other Name: SEAL, Transfer Case
- Position: Rear
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991 GMC Sonoma | PICKUP | 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal,Automatic Transmission Case Extension
Part Number: 8655031
Product Specifications
- Other Name: SEAL, Transfer Case; Extension Housing Seal, Output Shaft Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1992-1993 GMC Sonoma | PICKUP | 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
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GMC Sonoma Seal,Transfer Case Oil Pump Suction Pipe
Part Number: 15547430
Product Specifications
- Other Name: SEAL, Transfer Case
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L
View related parts
GMC Sonoma Seal,Transfer Case Front Output Shaft
Part Number: 12544075
Product Specifications
- Other Name: SEAL, Transfer Case
- Position: Front
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-2004 GMC Sonoma | 4 DOOR, PICKUP, PICKUP EXTENDED CAB | 4 Cyl 2.2L, 4 Cyl 2.2L Flex, 6 Cyl 4.3L
View related parts
GMC Sonoma Seal,Propeller Shaft Front Slip Yoke Oil
Part Number: 23049846
Product Specifications
- Other Name: SEAL, Rear Bearing Retaining; Extension Housing Seal
- Position: Front
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-1995 GMC Sonoma | PICKUP | 4 Cyl 2.2L, 4 Cyl 2.5L, 6 Cyl 2.8L, 6 Cyl 4.3L

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1-20 of 24 Results

GMC Sonoma Transfer Case Seal Parts Questions & Experts Answers

Seal,Main Shaft
12549329
Q: How to replace oil seals in a transmission?
A: Oil leaks frequently occur due to wear of the extension housing oil seal and bushing (if equipped), or the speedometer drive gear oil seal and o-ring. Replacement of these seals is relatively easy since the repairs can usually be performed without removing the transmission from the vehicle. The extension housing oil seal is located at the extreme rear of the transmission, where the driveshaft is attached. If leakage at the seal is suspected, raise the vehicle and support it securely on jack stands. If the seal is leaking, transmission lubricant will be built up on the front of the driveshaft and may be dripping from the rear of the transmission. To remove the oil seal and bushing, remove the driveshaft and carefully tap the dust shield (if equipped) to the rear and remove it from the transmission. On cast iron case (heavy duty) five-speed manual transmissions, remove the nut and U-joint flange. Using a screwdriver or seal removal tool, carefully pry the oil seal and bushing (if equipped) out of the rear of the transmission, being careful not to damage the splines on the transmission output shaft. If the oil seal and bushing cannot be removed with a screwdriver or pry bar, a special oil seal removal tool will be required. To install the new oil seal and bushing, use a large section of pipe or a very large deep socket as a drift and drive it into the bore squarely, making sure it's completely seated. Install a new bushing using the same method. Reinstall the U-joint flange and nut (if equipped) and tighten the nut to the torque specifications. Reinstall the dust shield (if equipped) by carefully tapping it into place. Finally, lubricate the splines of the transmission output shaft and the outside of the driveshaft sleeve yoke with lightweight grease, then install the driveshaft, being careful not to damage the lip of the new seal.

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