Drive Pinion Yoke Replacement Input Yoke

Tools Required

1. Remove the rear axle propeller shaft. Refer to One-Piece Propeller Shaft Replacement .



2. Remove the inter-axle differential input shaft nut and washer, if equipped.
3. Remove the input yoke.
4. Remove the drive pinion seal.
5. Inspect the input yoke seal surface for damage or scoring. If the seal surface is damaged, replace the input yoke.

Important: Lubricate the new inter-axle differential input shaft seal lip with the rear axle lubricant. For rear axle lubricant specifications, refer to Fluid and Lubricant Recommendations in Maintenance and Lubrication.

1. Install the drive pinion seal.



2. Install the input yoke.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

Important: 

•	Ensure that the threads are clean and free of grease.

•	Apply 272 Threadlocker GM P/N 12345493 or equivalent to the threads of the inter-axle differential input shaft nut.

3. Install the washer, if equipped, and the new inter-axle differential input shaft nut.

Tighten
Tighten the drive pinion nut to the torque listed in Fastener Tightening Specifications .

4. If a new inter-axle differential input shaft nut with pre-applied threadlocker is unavailable, reuse the original inter-axle differential input shaft nut under the following conditions:

•	The nut is in good condition.

•	The threadlocker is applied.

5. Remove the wheel blocks.