Differential Assembly: Adjustments

BACKLASH ADJUSTMENT





1. Install the differential case, the bearing cups, the spacers, and the shims as determined from the side bearing preload adjustment.
2. Rotate the case several times in order to seat the bearings.
3. Using a magnetic base, install a dial indicator to the case.
4. Place the indicator stem at the heel end of a gear tooth.
5. Set the dial indicator so that the stem is in line with the gear rotation and perpendicular to the tooth angle.
6. Install the differential bearing caps and the bolts.
^ Tighten the bolts to 75 Nm (55 ft. lbs.).

NOTICE: Refer to Fastener Notice in Service Precautions.

7. Check and record the backlash at three or four points around the ring gear.
^ When checking backlash, hold the pinion stationary.
^ The backlash should be the same at each point within 0.05 mm (0.002 inch). If the backlash varies more than 0.05 mm (0.002 inch), check for the following conditions:
- Burrs
- A distorted case flange
- Uneven bolting
8. For all new gear sets, backlash at the minimum lash point measured should be 0.13 - 0.23 mm (0.005 - 0.009 inch).
9. If the backlash is not within specifications, move the ring gear in or out from the pinion by increasing the thickness of one shim, and decreasing the thickness of the other shim an equal amount. This will maintain the correct axle side bearing preload.
Moving 0.05 mm (0.002 inch) of shim from one side of the differential to the other will change the backlash adjustment by 0.03 mm (0.001 inch).
10. When you have correctly adjusted the backlash, remove the bearing caps and the shim packs.





11. Select a shim 0.10 mm (0.004 inch) thicker than the one removed from the left side. Insert this shim between the spacer and the left bearing race.
12. Install the left bearing cap and bolts. Do not tighten.
13. Select a shim 0.10 mm (0.004 inch) thicker than the shim removed from the right side. Insert the shim between the spacer and the right bearing race. Drive the shim into place.
14. Install the right side bearing cap and bolts.
^ Tighten the bolts to 75 Nm (55 ft. lbs.).

15. Recheck the backlash. Correct as necessary.