Drive Pinion Bearings Replacement 9.75, 10.5 and 10.75 Inch Axles

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 yoke and the pinion oil seal. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement.



4. Remove the thrust washer.



5. Install the J 22536 as shown.

Ensure that the J 22536 is firmly seated on the pinion.

6. Drive the pinion out using the J 22536 and a hammer.

Strike the J 22536 slowly. Do not let the pinion fall out of the rear axle housing.

7. Remove the pinion preload shims, both axles, and the pinion spacer, 10.5 and 10.75 inch axles only, from the drive pinion and set aside.



8. Remove the inner pinion bearing cup and the oil deflector using the J 45703 , 9.75 inch axle, or the J 45706 , 10.5 and 10.75 inch axles (2) and the J 42176 (1).
9. Remove the outer pinion bearing cup using the J 45705 and the J 42176 .



10. Remove the inner pinion bearing using the J 22912-B and a hydraulic press.
11. Remove the selective pinion shim.

1. For the 9.75 inch axle, install the inner pinion bearing cup using the J 45704 (2) and the J 8092 (1).
2. For the 10.5 and 10.75 inch axles, install the inner pinion bearing cup using the J 44417 (2) and the J 8092 (1).



3. Install the outer pinion bearing cup using the J 7818 (2) and the J 8092 (1).
4. Determine the selective pinion shim thickness and the pinion preload shim thickness for the drive pinion. Refer to Pinion Depth Adjustment.
5. Install the differential assembly. Refer to Differential Replacement.
6. Fill the axle with the proper axle lubricant. Refer to Rear Axle Lubricant Replacement.
7. Lower the vehicle.

Drive Pinion Bearings Replacement 8.6, 9.5 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 drive pinion from the axle. Refer to Drive Pinion and Ring Gear Replacement.




Note: If servicing the  8.6  inch  axle go to step 4. If servicing the  9.5 inch axle go to step 5.

4. Using the DT 47688 Pinion Bearing Remover 8.6 Inch Axle and a press, remove the pinion bearing from the drive pinion.



5. Using the J 22912-B Split Plate Bearing Installer and a press, remove the bearing from the drive pinion.
6. Remove the selective pinion shim.




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  (1) for the  8.6 inch axle, or the J 8092 handle  (2) for the 9.5 inch axle, install the outer pinion bearing cup.



2. Using the J 45780 installer  (2) for the 8.6 inch axle or the J 22306 installer  (1) 9.5 inch axle, 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 installer or the J 36614 installer and a hammer, 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. Using the J 22388 installer , install a NEW pinion oil seal.
10. Install the pinion into the axle housing.
11. Apply sealant to the splines of the pinion yoke. Refer to Fluid and Lubricant Recommendations.



12. Align the marks made and install the pinion yoke.

Caution: Refer to Pinion Flange/Yoke Installation Caution in the Preface section.

13. Using a soft faced hammer, seat the pinion yoke onto the pinion shaft by tapping it until a few threads show through the yoke.

Note: Do not reuse the pinion nut, use NEW only.

14. Install the new pinion nut and the NEW pinion nut.



15. Install the J 8614-01 onto the pinion yoke as shown.

Note: If the rotating torque is exceeded, the pinion will have to be removed and a new collapsible spacer installed.

16. Using the J 8614-01 holding tool , tighten the pinion nut until the pinion end play is just taken up. Rotate the pinion while tightening the nut to seat the bearings.

Caution: Refer to Fastener Caution in the Preface section.




17. Using an inch-pound torque wrench, measure the rotating torque of the pinion. The torque 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.
18. 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 rotating measurement reads 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.

Note: Recheck the rotating torque and adjust if necessary.

19. Once the specified torque is obtained, rotate the pinion several times to ensure the bearings have seated.
20. Install the differential assembly. Refer to Differential Replacement.
21. Fill the axle with the proper axle lubricant. Refer to Rear Axle Lubricant Replacement.
22. Remove the support and lower the vehicle.