How to replace the rear Differential Seal on GMC Sonoma?

To remove the rear wheel, start by loosening the lug nuts and raising the rear of the vehicle on jackstands. Disconnect the driveshaft and secure it out of the way. Use an inch-pound torque wrench to check the torque required to rotate the pinion on semi-floating axles and record the reading. Make alignment marks on the pinion shaft, nut, and flange, and count the number of threads visible between the nut and shaft. Use a special tool or large pliers to loosen the self-locking pinion nut. Remove the nut and withdraw the companion flange, using a puller if necessary. Pry out the old seal and discard it. Lubricate the new seal and tap it into position with a seal installation tool or large socket. To install, align the mating marks and install the companion flange, tightening the pinion nut if needed. Apply non-hardening sealant to the spline ends on the flange. Install the washer and pinion nut, tightening it until the original number of threads are exposed. Measure the torque required to rotate the pinion and tighten the nut incrementally until it matches the recorded figure, slightly exceeding it to compensate for the new oil seal. Connect the driveshaft, install the wheels, and lower the vehicle, tightening the lug nuts to the proper torque.

Genuine GMC Sonoma Differential Seal

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5 Differential Seals found

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GMC Sonoma Differential Drive Pinion Gear Seal
Part Number: 26064028
$28.59 MSRP: $47.33
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Product Specifications
- Other Name: SEAL, Differential Drive Pinion Shaft Bearing; Pinion Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1997-2004 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 Differential Drive Pinion Gear Seal
Part Number: 12471523
$13.21 MSRP: $24.93
You Save: $11.72 (48%)
Ships in 1 Business Day
ADD TO CART
Product Specifications
- Other Name: SEAL, Differential Drive Pinion Shaft Bearing; Pinion Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 2000-2004 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 Differential Drive Pinion Gear Seal
Part Number: 26026792
$19.45 MSRP: $34.10
You Save: $14.65 (43%)
Product Specifications
- Other Name: SEAL, Differential Drive Pinion Shaft Bearing; Pinion Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1991-2001 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 Differential Drive Pinion Gear Seal
Part Number: 26033578
Product Specifications
- Other Name: SEAL, Differential Drive Pinion Shaft Bearing; Pinion Seal
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following Vehicles:
- 1994-1997 GMC Sonoma | PICKUP | 4 Cyl 2.2L, 6 Cyl 4.3L
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GMC Sonoma Seal,Front Differential Drive Pinion Gear
Part Number: 14039587
Product Specifications
- Other Name: SEAL, Differential Drive Pinion Shaft Bearing; Pinion Seal, Seal, Yoke Seal
- Position: Front
- 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

GMC Sonoma Differential Seal

GMC Sonoma Differential Seal prevents dirt accumulation and ensures leakage-free cornering by keeping axle gears oiled. In each GMC pickup, the seal is found at the axle housing around the half-shafts, keeping 75W-90 lube in and road grit out. It utilizes a synthetic rubber lip that grips the revolving shaft. When heat or low fluid dries the lip, it cracks and leaking occurs. The open differentials applied previously and later on the limited slip units applied on the Sonoma are both designed to an identical sealing concept. However, since LSDs run hotter, their compound is made to withstand a higher temperature. Most factory Differential Seal rings are made from nitrile or fluoro rubber. In comparison, the performance versions will add tougher blends or a small flange to resist cocking. However, the size and depth remain the same. The new Differential Seal must be driven flush and about two millimeters deeper than the bracket to avoid chafing and maintain the oil film. It is recommended that drivers check the fluid every 3,000 miles to prevent overheating gears caused by leaking Differential Seal. A worn unit on any GMC Sonoma shows wet streaks near the flange, and replacing the Differential Seal restores factory tightness.

Each OEM GMC Sonoma Differential Seal we offer is competitively priced and comes with the assurance of the manufacturer's warranty for the part. Furthermore, we guarantee the speedy delivery of your orders right to your doorstep. Our hassle-free return policy is also in place for your peace of mind.

GMC Sonoma Differential Seal Parts Questions & Experts Answers

Differential Drive Pinion Gear Seal
12471523
Q: How to replace the rear Differential Seal on GMC Sonoma?
A:
To remove the rear wheel, start by loosening the lug nuts and raising the rear of the vehicle on jackstands. Disconnect the driveshaft and secure it out of the way. Use an inch-pound torque wrench to check the torque required to rotate the pinion on semi-floating axles and record the reading. Make alignment marks on the pinion shaft, nut, and flange, and count the number of threads visible between the nut and shaft. Use a special tool or large pliers to loosen the self-locking pinion nut. Remove the nut and withdraw the companion flange, using a puller if necessary. Pry out the old seal and discard it. Lubricate the new seal and tap it into position with a seal installation tool or large socket. To install, align the mating marks and install the companion flange, tightening the pinion nut if needed. Apply non-hardening sealant to the spline ends on the flange. Install the washer and pinion nut, tightening it until the original number of threads are exposed. Measure the torque required to rotate the pinion and tighten the nut incrementally until it matches the recorded figure, slightly exceeding it to compensate for the new oil seal. Connect the driveshaft, install the wheels, and lower the vehicle, tightening the lug nuts to the proper torque.