Backlash & Final Assembly
- Rotate pinion and differential case several times to seat bearings. Using a dial indicator mounted to axle housing, check ring gear backlash at 4 different teeth locations around ring gear. Install indicator in line with gear rotation and perpendicular to tooth angle.
- Ensure pinion flange is locked in position or held rigid while taking each backlash reading. Four backlash readings should not vary more than .002" (.05 mm).
- Total backlash reading should be .003-.010" (.08-.25 mm). If backlash is incorrect, adjust side bearing shims as necessary. After backlash adjustment is completed, perform gear tooth contact pattern check. See GEAR TOOTH CONTACT PATTERNS article in GENERAL INFORMATION.
- If pattern is incorrect, adjust pinion or ring gear as required. Install axle shafts, "C" locks, pinion shaft and lock bolt. Tighten bolt to specification. See TORQUE SPECIFICATIONS . Install rear housing cover and add gear oil. See LUBRICATION .
NOTE:
DO NOT change total shim pack thickness for each side bearing. If a shim is removed from one side, add same thickness shim to other side.