Differential Drive Pinion Gear Bearing Replacement
Differential Drive Pinion Gear Bearing Replacement
Tools Required
- J 5590 Rear Pinion Bearing Race Installer (7.6 inch axle)
- J 7817 Outer Bearing Race Installer (7.6 inch axle)
- J 8092 Driver Handle
- J 8608 Rear Pinion Bearing Race Installer (1st design 8.6 inch axle)
- J 8611-01 Rear Pinion Bearing Race Installer (8.6 inch axle)
- J 22912-B Split Plate Bearing Puller
- J 24433 Pinion Cone and Side Bearing Installer (8.6 inch axle)
- J 29609 Rear Pinion Bearing Cup Installer (7.6 inch axle)
- J 45870 Pinion Bearing Cup Installer (2nd design 8.6 inch axle)
- J 45871 Pinion Bearing Remover
Removal Procedure
1. Raise the vehicle.
2. Remove the tire and wheel assemblies.
3. Remove the brake calipers, if equipped.
4. Remove the brake rotors, if equipped.
5. Remove the brake drums, if equipped.
6. Remove the axle shafts.
7. Remove the differential assembly.
8. Remove the drive pinion from the axle.
9. For 7.6 inch axles and 1st design 8.6 inch axles, press the bearing off of the pinion using the J 22912-B.
10. For 2nd design 8.6 inch axles, install the J 45871 (1) around the pinion bearing and the J 22912-B (2) in the inverted position around the J 45871.
11. Press the bearing off of the pinion using the J 45871 and the J 22912-B.
12. Remove the shim.
13. Remove the outer pinion bearing cup from the axle housing using a hammer and brass drift in the slots provided. Move the drift back and forth between one side of the cup and the other in order to evenly work the cup out of the housing.
14. Remove the inner pinon bearing cup from the axle housing using a hammer and brass drift in the slots provided. Move the drift back and forth between one side of the cup and the other in order to evenly work the cup out of the housing.
Installation Procedure
1. Install the outer pinion bearing cup using the J 7817 (7.6 inch axle) or the J 8611-01 (all 8.6 inch axles) (1) and the J 8092 (2).
2. Install the inner pinion bearing cup using the J 29609 (7.6 inch axle) or the J 8608 (1st design 8.6 inch axle) or the J 45870 (2nd design 8.6 inch axle) (1), and the J 8092 (2).
3. Determine the selective shim thickness for the pinion. Refer to Pinion Depth Adjustment.
4. Install the selective shim between the inner pinion bearing and the shoulder on the gear.
5. Install the inner pinion bearing using the J 5590 (7.6 inch axle) or the J 24433 (all 8.6 inch axles).
- Press the bearing on until the cone seats on the pinion shim.
6. Install a new collapsible spacer.
7. Lubricate the pinion bearing with axle lubricant. Use the proper fluid.
8. Install the pinion into the axle housing.
9. Install the outer pinion bearing onto the pinion.
10. Install a new pinion oil seal and the pinion flange/yoke.
11. Install the differential assembly.
12. Install the brake drums, if equipped.
13. Install the brake rotors, if equipped.
14. Install the brake calipers, if equipped.
15. Install the tire and wheel assemblies.
16. Fill the axle with lubricant. Use the proper fluid.
17. Lower the vehicle.