Seals and Gaskets: Service and Repair
Drive Pinion Flange/Yoke and/or Oil Seal Replacement
Special Tools
* J 8614-01 - Flange Holder and Remover
* J 33782 - Pinion Oil Seal Installer
* J 38694 - Extension Housing Oil Pump/Seal Installer
Removal Procedure
Note: Observe and mark the positions of all the driveline components, relative to the propeller shaft and the axles, prior to disassembly. These components include the propeller shafts, drive axles, pinion flanges, output shafts, etc. Reassemble all the components in the exact places in which you removed the parts. Follow any specifications, torque values, and any measurements made prior to disassembly
1. Raise the and support vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.
2. Remove the rear drum brakes. Refer to Brake Drum Replacement Removal and Replacement.
3. Remove the propeller shaft.
* For vehicles equipped with one piece propeller shafts, refer to One-Piece Propeller Shaft Replacement One-Piece Propeller Shaft Replacement.
* For vehicles equipped with two piece propeller shafts, refer to Two-Piece Propeller Shaft Replacement Two-Piece Propeller Shaft Replacement.
4. Use an inch-pound torque wrench, measure the amount of torque required to rotate the pinion. Record this measurement for reassembly. This will give the combined preload for the following components:
* The pinion bearings
* The pinion oil seal
* The differential case bearings
* The axle bearings
* The axle seals
5. Place an alignment mark between the pinion and the pinion yoke.
6. Using the J 8614-01 - tool to hold the pinion nut, remove the pinion nut and the washer.
Note: Use a container in order to retrieve the lubricant.
7. Using the J 8614-01 - tool (1) to hold the pinion yoke, remove the pinion yoke by turning the J 8614-3 (3) clockwise.
Note: Do not damage the housing.
8. Using a suitable tool, remove the pinion oil seal.
Installation Procedure
1. Using the J 33782 - installer for the 8.0 inch axle or the J 38694 - installer for the 8.6 inch axle , install the pinion seal.
2. Apply sealant to the splines of the pinion yoke. Refer to Adhesives, Fluids, Lubricants, and Sealers Rear Drive Axle.
3. Align the reference marks and install the pinion yoke.
Caution: Do not hammer the pinion flange/yoke onto the pinion shaft. Pinion components may be damaged if the pinion flange/yoke is hammered onto the pinion shaft.
4. Using a soft-faced hammer, tap the pinion yoke until the threads on the pinion shaft can be seen.
5. Install the washer and a NEW pinion nut.
Caution: Refer to Fastener Caution Fastener Caution.
6. While holding the J 8614-01 - tool , tighten the NEW pinion nut in small increments until the end play is just taken up.
Note:
* If the rotating torque is exceeded, the pinion will have to be removed and a new collapsible spacer installed.
* Compare this measurement with the rotating torque recorded during removal.
7. Using an inch pound torque wrench, measure the rotating torque of the pinion 0.40-0.57 Nm (3-5 lb in) greater than the rotating torque recorded during removal.
8. 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.
9. Install the propeller shaft.
* For vehicles equipped with one piece propeller shafts, refer to One-Piece Propeller Shaft Replacement One-Piece Propeller Shaft Replacement.
* For vehicles equipped with two piece propeller shafts, refer to Two-Piece Propeller Shaft Replacement Two-Piece Propeller Shaft Replacement.
10. Install the rear brake rotors. Refer to Brake Drum Replacement Removal and Replacement.
11. Inspect and add axle lubricant to the axle housing, if necessary. Refer to Differential Oil Replacement (8.0 Inch Axle) Differential Oil Replacement (8.0 Inch Axle)Differential Oil Replacement (8.6 Inch Axle) Differential Oil Replacement (8.6 Inch Axle).
12. Remove the support and lower the vehicle.