Drive Pinion Bearings Replacement 10.5 Inch Axle

Special Tools

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Remove the differential assembly. Refer to Differential Replacement.
3. Remove the pinion gear bearing retainer. Refer to Drive Pinion Bearings Replacement.
4. Remove the pinion yoke and the oil seal. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement.
5. Remove the outer pinion bearing.



6. Remove the pinion.



7. Remove the collapsible spacer.



8. Using the J 22912-B and a hydraulic press, remove the inner pinion bearing from the pinion.




Important: Insert the brass drift in the slots to remove the bearing cup.

Important: Move the drift back and forth between one side of the cup and the other in order to work the cups out of the retainer evenly.

9. Using a hammer and a brass drift, remove the outer pinion bearing cup.




Important: Insert the brass drift in the slots to remove the bearing cup.

Important: Move the drift back and forth between one side of the cup and the other in order to work the cups out of the retainer evenly.

10. Using a hammer and a brass drift, remove the inner pinion bearing cup.



11. Using a brass drift and a hammer, remove the pinion gear pilot bearing.

1. Using the J 22761 , install the pinion gear pilot bearing.



2. Using the J 37624  (2) and the J 8092  (1), install the inner pinion bearing cup in the pinion gear bearing retainer.



3. Using the J 8608  (2) and the J 8092  (1), install the outer pinion bearing cup in the pinion gear bearing retainer.




Important: Press the bearing on until the cone seats on the pinion.

4. Using the J 24433 and a hydraulic press, install the inner pinion bearing.
5. Install the new collapsible spacer.
6. Lubricate the pinion bearings with axle lubricant. Refer to Fluid and Lubricant Recommendations.
7. Install the outer pinion bearing into the pinion bearing retainer.
8. Using the J 44414 , install the new pinion oil seal.



9. Install the pinion in the pinion gear bearing retainer.
10. Apply sealant, GM  P/N 12346004 (Canadian P/N 10953480) or equivalent, to the splines of the pinion yoke.
11. Install the drive pinion flange/yoke. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement

Important:  Do not apply sealant to the pinion gear bearing retainer at this time.

12. Install the original shim to the pinion bearing retainer. If the original shim is not available, install a 0.41 mm (0.016 in) shim to build pinion depth.
13. Install the pinion gear bearing retainer to the axle housing.
14. Install the pinion bearing retainer bolts.

Tighten
Tighten the pinion gear retainer bolts to 88 N·m (65 lb ft).




15. Using an inch-pound torque wrench, measure the rotating torque of the pinion.

Specification
The rotating torque of the pinion should be between 1.0-2.3 N·m (10-20 lb in) for used bearings, or 1.7-3.4 N·m (15-30 lb in) for new bearings .

16. If the rotating torque measurement is below 1.0 N·m (10 lb in) for used bearings, or 1.7 N·m (15 lb in) for new bearings, install the J 8614-01 and continue to tighten the pinion nut.

Tighten
Tighten the pinion nut, in small increments, as needed, until the torque required in order to rotate the pinion is between 1.0-2.3 N·m (10-20 lb in) for used bearings, or 1.7-3.4 N·m (15-30 lb in) for new bearings.

17. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated.

Recheck the rotating torque and adjust if necessary.

18. Install the differential assembly. Refer to Differential Replacement.
19. Adjust the differential side bearing preload. Refer to Differential Carrier Bearing Preload Adjustment.
20. Determine the selective shim thickness for the drive pinion. Refer to Pinion Depth Adjustment.
21. Adjust the backlash. Refer to Backlash Adjustment.
22. Fill the axle with lubricant. Refer to Rear Axle Lubricant Replacement.
23. Lower the vehicle.

Drive Pinion Bearings Replacement 8.6 Inch Axle

Special Tools

1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle.
2. Remove the differential assembly. Refer to Differential Replacement.
3. Remove the drive pinion from the axle. Refer to Drive Pinion and Ring Gear Replacement.



4. Using the DT-47688 and a press, remove the bearing from the drive pinion.
5. Remove the shim.




Important: When performing the following service procedure, move the drift back and forth between one side of the cup and the other in order to work the cups out of the housing evenly

6. Using a hammer and a brass drift in the slots provided, remove the outer pinion bearing cup from the axle housing.




Important: When performing the following service procedure, move the drift back and forth between one side of the cup and the other in order to work the cups out of the housing evenly

7. Using a hammer and a brass drift in the slots provided, remove the inner pinion bearing cup from the axle housing.

1. Using the J 8611-01  (1) and the J 8092  (2), install the outer pinion bearing cup.



2. Using the J 45870  (2) and the J 8092  (1), install the inner pinion bearing cup.
3. Determine the selective shim thickness for the drive pinion. Refer to Pinion Depth Adjustment.
4. Install the selective shim between the inner pinion bearing and the shoulder on the gear.



5. Using the J 22828 or the J 36614 and a hammer, install the inner pinion bearing until the pinion bearing seats on the drive pinion shim.
6. Install a new collapsible spacer.
7. Lubricate the pinion bearings with axle lubricant. Use the proper fluid. Refer to Fluid and Lubricant Recommendations.
8. Install the outer pinion bearing into the axle housing.
9. Install the drive pinion flange/yoke and or oil seal. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement.



10. Using an inch-pound torque wrench, measure the rotating torque of the pinion.

Specification
The rotating torque of the pinion should be between 1.0-2.3 N·m (10-20 lb in) for used bearings, or 1.7-3.4 N·m (15-30 lb in) for new bearings .

11. If the rotating torque measurement is below 1.0 N·m (10 lb in) for used bearings, or 1.7 N·m (15 lb in) for new bearings, continue to tighten the pinion nut.

Tighten
Tighten the pinion nut, in small increments, as needed, until the torque required in order to rotate the pinion is between 1.0-2.3 N·m (10-20 lb in) for used bearings, or 1.7-3.4 N·m (15-30 lb in) for new bearings.

12. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated.
13. Recheck the rotating torque and adjust if necessary.
14. Install the differential assembly. Refer to Differential Replacement.
15. Fill the axle with lubricant. Use the proper fluid. Refer to Rear Axle Lubricant Replacement.
16. Remove the support and lower the vehicle.