GM Service Manual Online
For 1990-2009 cars only

Tools Required

    • J 33838 Pinion Shim Setting Gauge
    • J 29763 Dial Indicator
  1. Adjust the pinion depth by selecting a shim of the proper thickness.
  2. Lubricate the inner and outer pinion bearings liberally using axle lubricant.

  3. Object Number: 7827  Size: SH
  4. Hold the pinion bearings in position and install the J 33838 .

  5. Object Number: 7828  Size: SH
  6. Install the J 29763 .
  7. 4.1. Set the dial indicator at ZERO.
    4.2. Position the indicator in the J 33838 .
    4.3. Push the dial indicator downward until the needle rotates approximately 3/4 turns to the right.
  8. Tighten the dial indicator in this position.

  9. Object Number: 7827  Size: SH
  10. Set the button of the J 33838 on the differential bearing bore.
  11. Rotate the tool slowly back and forth until the dial indicator reads the lowest point of the bore. Set the dial indicator to ZERO. Repeat the rocking action of the tool in order to verify the ZERO setting.

  12. Object Number: 7828  Size: SH
  13. After you obtain and verify the ZERO setting, move the tool button out of the differential side bearing bore. Record the dial indicator reading.
  14. The dial indicator reading equals the shim size. For example, if the dial indicator reads 0.84 mm (0.033 in) in step 8, a 0.84 mm (0.033 in) shim is required.

  15. Remove the tools and bearing cones.