Tools Required

Important: Make sure all of the tools, the pinion bearings, and the pinion bearing cups are clean before proceeding.

1. Lubricate the pinion bearings with axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or equivalent meeting GM Specification 9986115.



2. Assemble the J 29763  (5) to the J 36601-3 (4) and J 36601-7 (1).
3. Assemble the J 21777-8 (3) onto the J 36601-7 (1).
4. Install the pinion bearings and hold them in place.
5. Insert the J 36601-7 (1) with the J 21777-8 (3) through the pinion bearings.
6. Install the J 36601-5 (2), the washer, and the nut to the J 36601-7 (1).
7. While holding the J 36601-3 (4) stationary, install an inch-pound torque wrench on the nut and tighten the nut until a rotating torque of 1.1-2.3 N·m (10-20 lb in) is obtained.

Rotate the assembly several times in both directions in order to seat the pinion bearings.

8. Check the rotating torque of the assembly. If the torque is less than 1.0 N·m (10 lb in), tighten the nut on the J 36601-7 until a rotating torque of 1.1-2.3 N·m (10-20 lb in) is obtained.

Important: The left side differential bearing adjuster assembly must be removed prior to placing the J 36601-3 in the differential side bearing bore.




9. Adjust the J 29763  (2) to the differential bearing bore by doing the following:

9.1.	Loosen the lock nut on the J 29763 .

9.2.	Place the contact pad of the J 36601 on the differential side bearing bore.

9.3.	With the contact pad of the J 36601 touching the differential side bearing bore, push down on the J 29763 until the needle of the J 29763 has turned 3/4 of a turn clockwise.

9.4.	Tighten the lock nut of the J 29763 .

10. Rotate the J 36601  (1) back and forth until the needle of the J 29763  (2) indicates the lowest point in the differential side bearing bore.
11. At the lowest point of deflection, move the housing of the J 29763 until the needle indicates ZERO.
12. Move the J 36601 back and forth again to verify the zero setting. Adjust the housing of the J 29763 as necessary to set the needle to ZERO.



13. After the ZERO setting is obtained and verified, grasp the J 36601  (1) by the flats and move the J 36601 out of the differential side bearing bore.
14. The value indicated on the J 29763  (2) is the thickness of the shim needed in order to set the depth of the pinion.
15. Select the shim that indicates the proper thickness. Measure the shim with a micrometer in order to verify that the thickness is correct.
16. Remove the pinion depth setting tools.
17. Remove the pinion bearings.
18. Install the pinion shim between the pinion and the inner pinion bearing. Refer to Differential Carrier Assembly Assemble .