Drive Pinion Bearings Replacement (8.6, 9.5 Inch Axle)
Drive Pinion Bearings Replacement (8.6, 9.5 Inch Axle)
Special Tools
* DT 47688 - Pinion Bearing Remover, 8.6 Inch Axle
* J 7818 - Inner Bearing Race Installer
* J 8092 - Universal Driver Handle 3/4 inch -10
* J 8611-01 - Rear Pinion Bearing Race Installer
* J 8614-01 - Flange and Pulley Holding Tool
* J 22306 - Pinion Cup Bearing Installer-Rear
* J 22912-B - Split Plate Bearing Installer
* J 22388 - Pinion Oil Seal Installer
* J 22828 - Input/Counterbalance Race Installer
* J 36614 - Inner Pinion Bearing Installer
* J 45780 - Pinion Bearing Cup Installer
Removal Procedure
1. Raise the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
2. Remove the differential assembly. Refer to Differential Replacement (8.6 Inch Axle) (Differential Replacement (8.6 Inch Axle))Differential Replacement (9.75, 10.5 and 10.75 Inch Axles) (Differential Replacement (9.75, 10.5 and 10.75 Inch Axles)).
3. Remove the drive pinion from the axle. Refer to Drive Pinion and Ring Gear Replacement (8.6 Inch Axle) (Service and Repair)Drive Pinion and Ring Gear Replacement (9.75, 10.5 and 10.75 Inch Axles) (Drive Pinion and Ring Gear Replacement (9.75, 10.5 and 10.75 Inch Axles)).
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.
Installation Procedure
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 (8.6 Inch Axle) (Pinion Depth Adjustment (8.6 Inch Axle))Pinion Depth Adjustment (9.75, 10.5 and 10.75 Inch Axles) (Pinion Depth Adjustment (9.75, 10.5 and 10.75 Inch Axles)).
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 (Service Intervals).
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 (Service Intervals).
12. Align the marks made and install the pinion yoke.
Caution: Refer to Pinion Flange/Yoke Installation Caution (Pinion Flange/Yoke Installation Caution).
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 (Fastener Caution).
17. Using an inch-pound torque wrench, measure the rotating torque of the pinion. The torque should be between1.0-2.3 Nm (10-20 lb in) for used bearings, or 1.7-3.4 Nm (15-30 lb in) for new bearings.
18. If the rotating torque measurement is below 1.0 Nm (10 lb in) for used bearings, or 1.7 Nm (15 lb in) for new bearings, continue to tighten the pinion nut in small increments until the rotating measurement reads 1.0-2.3 Nm (10-20 lb in) for used bearings, or 1.7-3.4 Nm (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 (8.6 Inch Axle) (Differential Replacement (8.6 Inch Axle))Differential Replacement (9.75, 10.5 and 10.75 Inch Axles) (Differential Replacement (9.75, 10.5 and 10.75 Inch Axles)).
21. Fill the axle with the proper axle lubricant. Refer to Rear Axle Lubricant Replacement (8.6, 9.5 Inch Axle) (Rear Axle Lubricant Replacement (8.6, 9.5 Inch Axle))Rear Axle Lubricant Replacement (9.75, 10.5 and 10.75 Inch Axles) (Rear Drive Axle).
22. Remove the support and lower the vehicle.