9.75 Inch Axle

Drive Pinion Flange/Yoke and/or Oil Seal Replacement (9.75 Inch Axle)

Tools Required
^ J8614-01 Flange and Pulley Holding Tool
^ J45710 Pinion Bearing Oil Seal Installer

Removal Procedure

Important: 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 vehicle. Refer to Vehicle Lifting.
2. Disconnect the propeller shaft from the rear axle pinion yoke.





3. Place an alignment mark between the pinion and the pinion yoke.





4. Install the J8614-01 as shown.
5. Remove the pinion nut while holding the J8614-01.





6. Remove the washer.





7. Install the J8614-2 (2) and the J8614-3 (3) into the J8614-01 (1) as shown.
8. Remove the pinion yoke by turning the J8614-3 (3) clockwise while holding the J8614-01 (1).
Use a container in order to retrieve the lubricant.
9. Remove the pinion oil seal. Use a suitable seal removal tool. Do not damage the axle housing.

Installation Procedure
1. Apply a light coat of axle lubricant, GM P/N 12378557 or equivalent meeting GM Specification 9986207, to the lip of the pinion seal.





2. Install the new seal using the J45710.





3. Install the pinion yoke.

Notice: Refer to Pinion/Yoke Installation Notice In Service Precautions.

4. Seat the pinion yoke onto the pinion shaft by tapping it with a soft-faced hammer until a few pinion shaft threads show through the yoke.





5. Install the washer.





6. Install the new pinion nut





7. Install the J8614-01 onto the pinion yoke as shown.

Notice: Refer to Fastener Notice in Service Precautions.

8. Tighten the pinion nut while holding the J8614-01.
Tighten the pinion nut to 370 Nm (273 lb ft).
9. Install the propeller shaft to the rear axle pinion yoke.
10. Inspect and add axle lubricant to the axle housing, if necessary.
11. Lower the vehicle.