Backlash Adjustment

Checking Backlash

^ Tools Required
- J 39704 Dial Indicator








1. Mount a J 39704 with a magnetic base to the axle housing.





2. Place the indicator tip of the J 39704 on the heel end (1) of the ring gear tooth.

Important: The measurement must not vary more than 0.05 mm (0.002 inch) between the points checked.
3. Check the backlash at three equally spaced points.

Important: The reduction in the shim pack on one side must be equal to the increase in the shim pack on the other side.

4. If the backlash needs adjustment, remove the differential case from the housing.
5. If the backlash is correct, change the preload on each side by an equal amount.
6. Make a final gear pattern check. Refer to Gear Tooth Contact Pattern Check.