LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2020 >> Express 2500 LS, 6.0L Eng VIN G >> Repair and Diagnosis >> External Pages >> Different car >> Section 45 (Rear Drive Axle) >> Repair Instructions >> Locking Differential Adjustment (9.5 LD Inch Axles) >> Thrust Block Clearance Adjustment

Thrust Block Clearance Adjustment

WARNING: This page is about a different car, the 2019 GMC Savana 3500, 2019 GMC Savana 2500, 2019 Chevrolet Express 3500, and 2019 Chevrolet Express 2500. However, it is still accessible from the selected car via links, so may be relevant.
  1. GM790754
    NOTE:

    The left and right side gear backlash measurements must be done before the thrust block measurement can be completed.

    Install the locking differential clutch disc thrust washer into the left side or flange-end of the differential case.

  2. GM790759

    Install the locking differential side gear cam unit and clutch disc assembly into the left side or flange-end of the differential case.

  3. Install the differential side gear shim into the right side of the differential case.
  4. Install the locking differential side gear and clutch disc assembly into the right side of the differential case.
    5. NOTE:

    Tighten the pinion shaft bolt finger tight.

  5. Install the pinion shaft and the bolt.
  6. GM790751

    Install a brass drift between the left locking differential side gear cam unit and the pinion shaft.

  7. 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 locking differential side gear and the pinion shaft.
  9. Press the brass drift in far enough in order to hold the right side gear assembly in place.
  10. GM790765
    NOTE:

    DO NOT measure the distance between the side gear teeth.

    Using a 25.4 - 50.8 mm (1 - 2 in) telescoping gauge, measure the distance between the side gear faces.

  11. Measure the telescoping gauge with a micrometer and record the measurement.
    12. NOTE:

    If the measurement is equal to one of the thrust blocks sizes available, then select that thrust block.

  12. Compare the measurement obtained in step 11 to the thrust block sizes available.
    13. NOTE:

    For example, if the measurement is 33.833 mm (1.332 in), select the 33.782 mm (1.330 in) 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.
    14. NOTE:

    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 33.578 mm (1.322 in) for the 8.6 inch axle or 40.488 mm (1.622 in) for the 9.5 axle, 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 34.290 mm (1.350 in) for the 8.6 inch axle or 41.120 mm (1.622 in) for the 9.5 axle, 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.
  18. Assemble the differential. Locking Differential Assemble (9.5 Inch Axle) , or Locking Differential Assemble (10.5 Inch Axle) 
scientia non olet · About LEMON Manuals