Important: Observe and reference mark the positions of all the driveline components, relative to the propeller shaft and axles, prior to disassembly. Reassemble all of the components in the exact relationship to each other as the parts were when these parts were removed. You must follow any specifications and torque values, and any measurements obtained prior to disassembly.

1. Remove the drive pinion yoke. Refer to Drive Pinion Yoke Replacement .

Important: Do not damage the carrier.

2. Remove the pinion oil seal by driving the seal out of the carrier using a blunt punch or drift.
3. Inspect the seal surface of the pinion flange for the following conditions:

•	Tool Marks

•

Nicks

•	Damage such as a groove worn by the seal

4. Inspect the carrier bore for burrs that might cause leaks around the outside of the seal.

Tools Required

J 33782 Pinion Oil Seal Installer

1. Install the new pinion oil seal using the J 33782 .
2. Apply special seal lubricant (GM P/N 1052497 or equivalent) to the outside of the pinion flange and the sealing lip of the new pinion oil seal.
3. Install the drive pinion yoke. Refer to Drive Pinion Yoke Replacement .