LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 121 (Rear Drive Axle) >> Repair Instructions >> Locking Differential Adjustment (9.5 Inch Axle) >> Thrust Block Clearance Adjustment

Thrust Block Clearance Adjustment

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: View Of Left Side Gear Thrust Washer
    GM790754Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The left and right side gear backlash measurements must be done before the thrust block measurement can be completed.
  1. Install the locking differential side gear thrust washer into the differential case.
    2. Fig 2: View Of Left Side Gear Cam Unit & Clutch Disc Assembly
    GM790759Courtesy of GENERAL MOTORS CORP.
  2. Install the left side locking differential side gear cam unit and clutch disc assembly into the differential case.
  3. Install the right side differential side gear shim into the differential case.
  4. Install the right side locking differential side gear and clutch disc assembly into the differential case.
  5. Install the pinion shaft.
  6. Install the pinion shaft bolt.

    Tighten:  Tighten the pinion shaft bolt finger tight.

    7. Fig 3: View Of Brass Drift Placed Between Locking Differential Side Gear & Pinion Shaft
    GM790751Courtesy of GENERAL MOTORS CORP.
  7. Install a brass drift between the left side gear and the pinion shaft.

    Press the brass drift in far enough in order to compress the clutch disc assembly and hold the left side gear assembly in place.

  8. Install a brass drift between the right side gear and the pinion shaft.

    Press the brass drift in far enough in order to hold the right side gear assembly in place.

    9. Fig 4: Measuring Distance Between Side Gear Faces
    GM790765Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: Do not measure the distance between the side gear teeth.
  9. Measure the distance between the side gear faces using a 25.4-50.8 mm (1-2 in) telescoping gage.
  10. Remove the telescoping gage.
  11. Measure the telescoping gage with a micrometer.

    Record the measurement.

  12. Compare the measurement obtained in step 11 to the thrust block sizes available. If the measurement is equal to one of the thrust blocks sizes available, then select that thrust block.
  13. If the measurement obtained in step 11 is not equal to one of the thrust blocks sizes available, then select the thrust block that is smaller than the measurement.

    For example, if the measurement is 40.869 mm (1.609 in), select the 40.792 mm (1.606 in) thrust block.

    14. IMPORTANT: The backlash must be rechecked and adjusted to specification anytime the left and/or the right thrust washers are replaced.
  14. If the measurement obtained in step 11 is less than 40.488 mm (1.594 in), then reduce the left side gear thrust washer or the right side gear shim thickness in order to increase the thrust block opening.
  15. If the measurement obtained in step 11 is greater than 41.120 mm (1.622 in), then increase the left side gear thrust washer or the right side gear shim thickness in order to decrease the thrust block opening.
  16. Recheck the left and/or right side gear backlash and adjust as necessary.
  17. Recheck the thrust block clearance and adjust as necessary.
scientia non olet · About LEMON Manuals