Drive Pinion and Ring Gear Replacement (8.6 Inch Axle)
Drive Pinion and Ring Gear Replacement (8.6 Inch Axle)
Special Tools
J 22536 - Pinion Driver
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 pinion yoke and the oil seal. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6, 9.5 Inch Axles) (Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6, 9.5 Inch Axles))Drive Pinion Flange/Yoke and/or Oil Seal Replacement (9.75, 10.5 and 10.75 Inch Axles) (Rear Drive Axle).
4. Install the J 22536 as shown.
Note: Ensure that the J 22536 - driver is firmly seated on the pinion.
Note: Do not let the pinion fall out of the rear axle housing.
5. Using the J 22536 - driver and a hammer, remove drive the pinion.
6. Remove and discard the collapsible spacer from the pinion.
7. Remove the drive pinion bearings. Refer to Drive Pinion Bearings Replacement (9.75, 10.5 and 10.75 Inch Axles) (Drive Pinion Bearings Replacement (9.75, 10.5 and 10.75 Inch Axles))Drive Pinion Bearings Replacement (8.6, 9.5 Inch Axle) (Service and Repair).
Note: The ring gear bolts have left-hand threads.
8. Remove and discard the ring gear bolts.
Caution: Refer to Ring Gear Removal Caution (Ring Gear Removal Caution).
9. Using a brass drift and a hammer, remove the ring gear from the differential.
Installation Procedure
Note: The mating surface of the ring gear and the differential case must be clean and free of burrs before installing the ring gear.
1. Install the ring gear to the differential case.
Note: The ring gear bolts have left-hand threads.
Caution: Refer to Fastener Caution (Fastener Caution).
2. Hand start each bolt of the NEW ring gear bolts and then tighten in sequence to 20 Nm (89 lb ft).
3. Install the pinion bearing. Refer to Drive Pinion Bearings Replacement (9.75, 10.5 and 10.75 Inch Axles) (Drive Pinion Bearings Replacement (9.75, 10.5 and 10.75 Inch Axles))Drive Pinion Bearings Replacement (8.6, 9.5 Inch Axle) (Service and Repair).
4. Determine the selective shim thickness for the pinion gear. 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)).
5. Install the selective shim onto the pinion.
6. Install a new collapsible spacer.
7. Lubricate the pinion bearings with axle lubricant. Refer to Fluid and Lubricant Recommendations (Service Intervals).
8. Install the outer pinion bearing into the axle housing.
9. Install the new pinion oil seal. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6, 9.5 Inch Axles) (Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6, 9.5 Inch Axles))Drive Pinion Flange/Yoke and/or Oil Seal Replacement (9.75, 10.5 and 10.75 Inch Axles) (Rear Drive Axle).
10. Install the pinion into the axle housing.
11. Install the pinion yoke. Refer to Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6, 9.5 Inch Axles) (Drive Pinion Flange/Yoke and/or Oil Seal Replacement (8.6, 9.5 Inch Axles))Drive Pinion Flange/Yoke and/or Oil Seal Replacement (9.75, 10.5 and 10.75 Inch Axles) (Rear Drive Axle).
12. 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)).
13. Fill the axle with lubricant. Use the proper fluid. 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).
14. Remove the support and lower the vehicle.