Side Bearing Preload Adjustment

Part 1 Of 2:

Part 2 Of 2:

GENERAL INFORMATION
The differential side bearing preload is adjusted by a nut in the differential bearing bore. The bore and bearing cap provide the mating threads for the nut.

The differential must be initially preloaded in order to determine the backlash of the gear set. After the backlash has been set, the final bearing preload is set.

INSTALL OR CONNECT

- Tool Required:
- J 24429 Side Bearing Backlash Adjusting Wrench

NOTICE: Always use the correct fastener in the proper location. When you replace a fastener, use ONLY the exact part number for that application. The manufacturer will call out those fasteners that require a replacement after removal. The manufacturer will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and joint clamping force, and may damage the fastener. When you Install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.

1. The bearing cups to the differential bearings in their original locations.
2. Differential assembly in the axle housing.
3. Bearing shims.
- Push the case away from the pinion towards the axle housing.
4. Adjusting nut.
A. Tighten the adjusting nut using J 24429.
B. Turn the pinion to seat the bearings.
C. Back off the adjusting nut.
5. Bearing caps and bolts in their original positions.
A. Assemble the caps loosely.





B. Turn the adjusting nut until the nut contacts the shim. Then tighten the nut three additional slots.
- Tighten bearing cap bolts to 74 Nm (55 ft. lbs.).
6. Adjusting nut lock and lock bolt.
- Measure the ring gear to pinion backlash. Refer to BACKLASH ADJUSTMENT.
- Adjusting nut lock bolt to 30 Nm (22 ft. lbs.) after setting the backlash.