Pinion Flange: Service and Repair

Drive Pinion Flange/Yoke and/or Oil Seal Replacement (RPO LSA) (6.2L)

Special Tools

* J 34826 - Hub Nut Socket 36 mm
* J 42851 - Front Cover Oil Seal Installer
* J 45012 - Pinion Flange Holder
* J 45019 - Pinion Cartridge Remover

Removal Procedure

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle (Service and Repair).
2. Remove the exhaust system. Refer to Exhaust System Replacement (With LY7 or LLT) (Service and Repair).
3. Remove the propeller shaft from the vehicle. Refer to Rear Propeller Shaft Replacement (RPO LP1/LY7) (Service and Repair)Rear Propeller Shaft Replacement (RPO LSA) (Service and Repair).





Note: Position the bolt (3) behind and outside of the J 45012.

4. Using the J 45012 - holder (1) and the J 34826 - socket (2), remove the drive pinion flange nut.
5. Remove the J 45012 - holder.




6. Using the J 45019 - remover (1), remove the flange.





Note: Do not damage the sealing surfaces of the pinion shaft or differential pinion housing.

7. Using the appropriate tool, remove the drive pinion seal (2) from the differential housing (1).

Installation Procedure

1. Remove any debris and excess gear lubricant from the pinion bore.
2. Lubricate the drive pinion flange sealing surface with the gear lubricant. Refer to Adhesives, Fluids, Lubricants, and Sealers (Adhesives, Fluids, Lubricants, and Sealers).




3. Using the J 42851 - installer (1), install the drive pinion seal to the differential housing.

Note: Allow the drive pinion gear threads and the nut to air dry.

4. Using the appropriate cleaning solvent, thoroughly clean the drive pinion shaft threads and the drive pinion flange nut.

Note: Ensure that there are no gaps in the threadlocker along the length of the filled area of the pinion shaft threads.

5. Apply threadlocker to 2/3 of the threaded length of the pinion shaft threads. Refer to Adhesives, Fluids, Lubricants, and Sealers (Adhesives, Fluids, Lubricants, and Sealers).




6. Position the drive flange (2) on the pinion gear (1).
7. Install the pinion nut (3) on the pinion gear (1).





Caution: Refer to Fastener Caution (Fastener Caution).

Note: Position the bolt (3) behind and outside of the J 45012.

8. Using the J 45012 - holder (1) and the J 34826 - socket (2) , tighten the pinion nut to245 Nm (181 lb ft).
9. Install the propeller shaft. Refer to Rear Propeller Shaft Replacement (RPO LP1/LY7) (Service and Repair)Rear Propeller Shaft Replacement (RPO LSA) (Service and Repair)
10. Inspect the rear drive axle lubricant level. Refer to Rear Axle Lubricant Level Inspection (Procedures).
11. Install the exhaust system. Refer to Exhaust System Replacement (With LY7 or LLT) (Service and Repair).
12. Remove the supports and lower the vehicle.