Tools Required

J 8001 Dial Indicator Set

1. Remove the rear axle housing cover.

Refer to Rear Axle Housing Cover and Gasket Replacement




2. Rotate the differential case (1) several times in order to seat the bearings.
3. Mount the J 8001 .
4. Use a small button on the indicator stem in order to make contact with the near heel end of the tooth.
5. Set the J 8001 so that the following conditions are met:

•	The stem is in line with the gear rotation

•	The stem is perpendicular to the tooth angle

6. Measure the backlash at three or four points around the ring gear (3).

Hold the drive pinion gear stationary when checking backlash.

7. The lash must not vary over 0.05 mm (0.002 in) around the ring gear (3).

If the variation is over 0.05 mm (0.002 in), inspect for the following conditions:

•

Burrs

•	Uneven bolting conditions

•	A distorted case flange

•	Correct the conditions as necessary.

8. The backlash at the point of minimum lash should be between 0.13-0.23 mm (0.00-0.009 in) for all new gears.

Adjust the backlash as necessary by increasing the thickness of one bearing shim and decreasing the thickness of the other bearing shim by the same amount.

Transfer 0.05 mm (0.002 in) in bearing shim thickness for each 0.03 mm (0.001 in) change in backlash desired.

For example, use the following steps in order to decrease the backlash by 0.03 mm (0.001 in):

8.1.	Decrease the thickness of the right bearing shim by 0.05 mm (0.002 in).

8.2.	Increase the thickness of the left bearing shim by 0.05 mm (0.002 in).

Refer to Differential Carrier Bearing Preload Adjustment for further information.

9. Install the rear axle housing cover.

Refer to Rear Axle Housing Cover and Gasket Replacement