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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Drivelines & Axles >> Differentials & Drive Axles >> Front Drive Axle >> Repair Instructions >> Pinion Depth Adjustment >> Adjustment

Pinion Depth Adjustment: Adjustment

    IMPORTANT: Make sure all of the tools, the pinion bearings, and the pinion bearing cups are clean before proceeding.
  1. Lubricate the pinion bearings with axle lubricant, GM P/N 12378261 (Canadian P/N 10953455) or equivalent meeting GM Specification 9986115.
    2. Fig 1: Using J 36601-7, J 36601-5, J 21777-8 & J 36601-3 To Adjust Pinion Depth
    GM864965Courtesy of GENERAL MOTORS CORP.
  2. Assemble the J 29763  (5) to the J 36601-3 (4) and J 36601-7 (1). See Special Tools .
  3. Assemble the J 21777-8 (3) onto the J 36601-7 (1).
  4. Install the pinion bearings and hold them in place.
  5. Insert the J 36601-7 (1) with the J 21777-8 (3) through the pinion bearings.
  6. Install the J 36601-5 (2), the washer, and the nut to the J 36601-7 (1).
  7. While holding the J 36601-3 (4) stationary, install an inch-pound torque wrench on the nut and tighten the nut until a rotating torque of 1.1-2.3 N.m (10-20 lb in) is obtained.

    Rotate the assembly several times in both directions in order to seat the pinion bearings.

  8. Check the rotating torque of the assembly. If the torque is less than 1.0 N.m (10 lb in), tighten the nut on the J 36601-7 until a rotating torque of 1.1-2.3 N.m (10-20 lb in) is obtained.
    9. IMPORTANT: The left side differential bearing adjuster assembly must be removed prior to placing the J 36601-3 in the differential side bearing bore.
    Fig 2: Using J 36601-3 & J 29763 To Measure Lowest Point In Differential Side Bearing Bore
    GM864970Courtesy of GENERAL MOTORS CORP.
  9. Adjust the J 29763  (2) to the differential bearing bore by doing the following:. See Special Tools .
    1. Loosen the lock nut on the J 29763  . See Special Tools .
    2. Place the contact pad of the J 36601  on the differential side bearing bore. See Special Tools .
    3. With the contact pad of the J 36601  touching the differential side bearing bore, push down on the J 29763  until the needle of the J 29763  has turned 3/4 of a turn clockwise. See Special Tools .
    4. Tighten the lock nut of the J 29763  . See Special Tools .
  10. Rotate the J 36601  (1) back and forth until the needle of the J 29763  (2) indicates the lowest point in the differential side bearing bore. See Special Tools .
  11. At the lowest point of deflection, move the housing of the J 29763  until the needle indicates ZERO. See Special Tools .
  12. Move the J 36601  back and forth again to verify the zero setting. See Special Tools . Adjust the housing of the J 29763  as necessary to set the needle to ZERO. See Special Tools .
    13. Fig 3: Using J 36601-3 & J 29763 To Measure Thickness Of Shim Needed In Order To Set Depth Of Pinion
    GM864974Courtesy of GENERAL MOTORS CORP.
  13. After the ZERO setting is obtained and verified, grasp the J 36601  (1) by the flats and move the J 36601  out of the differential side bearing bore. See Special Tools .
  14. The value indicated on the J 29763  (2) is the thickness of the shim needed in order to set the depth of the pinion. See Special Tools .
  15. Select the shim that indicates the proper thickness. Measure the shim with a micrometer in order to verify that the thickness is correct.
  16. Remove the pinion depth setting tools.
  17. Remove the pinion bearings.
  18. Install the pinion shim between the pinion and the inner pinion bearing. Refer to Differential Carrier Assembly Assemble .
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