Drive Pinion Bearings Replacement 8.6, 9.5, 11.5 Inch Axle

1. Raise and support 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.




Note: Step 4 is for those vehicles equipped with the 8.6 inch axle.

4. Using the DT 47688 remover and a press, remove the bearing from the drive pinion.




Note: Step 5 is for those vehicles equipped with the 9.5 LD inch axle.

5. Using the J 22912 remover and a press, remove the differential pinion beating



6. Remove the shim (1).




Note: 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 outer pinion bearing cup from the axle housing.




Note: 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.

8. 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 installer , 8.6 inch axle, or the J 7818 installer , 9.5/9.5LD inch axle (1), and the J 8092  (2), install the outer pinion bearing cup.



2. Using the J 45870 , 8.6 inch axle, or the J 22306 , 9.5/9.5LD inch axle (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 (1) on the shoulder on the differential pinion gear (2).




Note: Press the bearing on until the cone seats on the pinion shim.

5. Using the J 22828 installer or the J 36614 installer , install the inner pinion bearing.



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 differential pinion gear into the axle housing.

Note: DO NOT re-use the old pinion nut, replace with NEW only.

10. Install the NEW differential pinion oil seal, flange/yoke, and the NEW nut and washer. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement.



11. Using an inch-pound torque wrench, measure 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..
12. 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 in small increments, 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..
13. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated.
14. Recheck the rotating torque of the pinion bearing and adjust if necessary
15. Install the differential assembly. Refer to Differential Replacement.
16. Fill the axle with lubricant. Use the proper fluid. Refer to Rear Axle Lubricant Replacement.
17. Remove the support and lower the vehicle.

Drive Pinion Bearings Replacement 10.5 Inch Axle

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. Using an hydraulic press and the appropriate supports, remove the differential pinion gear.



7. Remove the collapsible spacer.



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




Note: 

•	Insert the brass drift in the slots to remove the bearing cup.

•	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.




Note: 

•	Insert the brass drift in the slots to remove the bearing cup.

•	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. Position the drive pinion pilot gear bearing (1) in the differential housing (2).



2. Using the J  22761 installer  (1) and the J  8092 driver  (2), install the drive pinion gear pilot bearing in the differential housing (3).



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



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




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

5. Using the J  24433 installer and a hydraulic press, install the inner pinion bearing.



6. Install the new collapsible spacer.
7. Lubricate the pinion bearings with axle lubricant. Refer to Fluid and Lubricant Recommendations.
8. Install the outer pinion bearing into the pinion bearing retainer.
9. Using the J  44414 installer , install the new pinion oil seal.



10. Install the pinion in the pinion gear bearing retainer.
11. Install the drive pinion flange/yoke. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement

Note:  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.

Caution: Refer to Fastener Caution in the Preface section.

14. Install the pinion bearing retainer bolts and tighten to 88 N·m (65 lb ft)..



15. Using an inch-pound torque wrench, measure the rotational torque of the pinion it 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, use the J  8614-01 remover and continue to tighten the pinion nut in small increments until the rotational torque 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. Remove the support and lower the vehicle.