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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Rear Drive Axle - Locking/Limited Slip Rear Axle >> Repair Instructions >> Locking Differential Adjustment >> Right Side Gear Backlash Adjustment

Right Side Gear Backlash Adjustment

  1. Assemble the clutch plates.

    Alternate the plates.

  2. Assemble the guide clips to the plates.

    Use grease in order to hold the clips in place on the plates.

  3. Install the side gear thrust washer, the clutch plate assembly and the right side gear to the differential case.
  4. Install the pinion gears and the side gear thrust washers into the differential case.

    Align the openings of the pinion gears and the pinion gear thrust washers to the pinion shaft opening in the differential case.

  5. Press down on the side gear and install the pinion shaft.

    If the side gear cannot be pressed down far enough to install the pinion shaft, replace the side gear thrust washer with a thinner washer.

  6. Install the pinion shaft lock bolt.

    Tighten the pinion shaft lock bolt finger tight.

  7. Rotate the pinion gear closest to the lock bolt so that one of the teeth is pointing downward (perpendicular to the ring gear flange).
  8. Insert a large tapered tool, such as a screwdriver, firmly between the side gear and the pinion shaft.
  9. Measure the backlash of the pinion gear and the side gear by doing the following:
    1. 9.1. Install the J 7872  to the ring gear flange.
    2. 9.2. Loosely clamp the J 8001  onto the stem on the J 7872. 
    3. 9.3. Place the contact pad of the J 8001  on one of the teeth of the pinion gear closest to the pinion shaft lock bolt.

      Turn the dial of the J 8001  until the needle and the dial face indicate zero.

    4. 9.4. Tighten the lock nut of the J 8001  finger tight.
    5. 9.5. Pull the pinion gear firmly into the differential case seat.
    6. 9.6. Rotate the pinion gear back and forth.
    7. 9.7. Measure the backlash.

      Measure the measurement.

    8. 9.8. Measure the backlash for the opposite pinion gear.
    9. 9.9. Add the measurements together.

      Specification 

      1. The backlash for the pinion gears should be 0.051-0.243 mm (0.002-0.010 in).
    Fig 1: Measuring RH Side Differential Gear Backlash
    G01643179Courtesy of GENERAL MOTORS CORP.
  10. If the backlash is too large, install a thicker side gear thrust washer and measure the backlash again.
  11. If the backlash is too small, install a thinner side gear thrust washer and measure the backlash again.
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