Backlash Adjustment

1. Install the differential case assembly and bearing caps.
2. Rotate the case several times to seat the bearings.
3. Remove the spreader
4. Install the differential bearing caps and bolts (2) Tighten differential bearing cap bolts.
^ Torque 108 Nm (80 ft. lbs.).
5. Install a dial indicator to the case using a magnetic base.





6. Place the indicator stem at the heel end of a tooth. Set the dial indicator so that the stem is in line with the gear rotation and perpendicular to the tooth angle.
7. Check and record the backlash at three points around the ring gear.
- The pinion must be held stationary when checking backlash.
- The backlash should be the same at each point within 0.07 mm (0.003 inch). If the backlash varies more than 0.07 mm (0.003 inch), check for burrs, a distorted case flange, or uneven bolting conditions.
8. Backlash at the minimum lash point measured should be between 0.13 and 0.20 mm (0.005 and 0.008 inch) for all new gear sets.
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 by the same amount. This will maintain the correct rear axle side bearing preload. Moving 0.05 mm (0.002 inch) worth of shim from one side of the differential to the other will change the backlash adjustment by 0.03 mm (0.001 inch).