Tools Required

1. Lubricate all of the components of the differential before assembly.

Use one of the following lubricants:

•	Axle lubricant

•	Synthetic Gear Lubricant 75W-90, GM P/N 12378261 (Canadian P/N 10953455) or equivalent

2. Clean the connecting surfaces of the ring gear and the differential case.

Caution: Once the speed sensor reluctor wheel has been removed from the differential case, a new speed sensor reluctor wheel must be installed. The press fit may be lost if the speed sensor reluctor wheel is used more than once. This would allow the speed sensor reluctor wheel to rotate freely on the differential case causing a significant reduction in performance of the antilock brake system, which could result in bodily injury.




3. On vehicles with a non-traction control rear axle, place the speed sensor reluctor wheel over the differential case on the ring gear side.

Install the speed sensor reluctor wheel.

4. On vehicles with a non-traction control rear axle, position the ring gear over the speed sensor reluctor wheel.

Install the ring gear (2).

5. Install 2 ring gear bolts/screws into opposite sides of the ring gear.

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.

6. Install the remaining new ring gear bolts/screws.

Finger tighten the new ring gear bolts/screws.

Tighten
Tighten the differential ring gear bolts/screws alternately in progressive stages to 120 N·m (89 lb ft).

7. Position the side gear thrust washers over the side gear hubs.

If the original side gear thrust washers are being installed, install the side gear thrust washers in their original positions.

8. Install the pinion gears into the differential case.

If the original pinion gears are being installed, install the pinion gears in their original positions.

9. Position one upper or lower pinion gear, without a pinion thrust washer, between the left pinion gear and the right pinion gear.

Rotate the pinion gears until one of the upper or lower pinion gears is opposite the loading opening in the differential case.

10. Position the other pinion gear between the left and the right pinion side gears so that the pinion gear shaft holes are aligned.

Rotate the pinion gears until the holes in the upper and the lower pinion gears are aligned with the holes in the differential case.

11. Rotate the upper and the lower pinion gears back toward the loading opening enough to permit sliding in the pinion thrust washers.



12. Use the J 8092 , the J 21465-13 and the J 25299 in order to install the differential bearings (1) to the differential case.