GM Service Manual Online
For 1990-2009 cars only

Front Differential Carrier End Play Check FWD Only

Tools Required:

    • J 8001 Dial Indicator Set
    • J 25025-8 Dial Indicator Mounting Post
    • J 26958-10B Adapter Plug
    • J 28585 Snap Ring Remover

    Object Number: 10517  Size: SH
  1. If the final drive assembly (700) has been removed it must be reinstalled.
  2. Make sure that the thrust washer (714) and the bearing (715) are still on the differential carrier.
  3. Install the case extension seal (8) onto the case extension (6).
  4. Install the case extension assembly (6) onto the transmission case.
  5. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  6. Install only 2 of the 4 case extension bolts (5).
  7. Tighten
    Do not torque the bolts. Tighten them only until the case extension is fully seated.


    Object Number: 10520  Size: SH
  8. Position the transmission so that the case extension is facing upward.
  9. Install J 25025-8 , J 26958-10B , and J 8001 .
  10. Set the dial indicator to zero.
  11. Notice: Use a piece of wood or rubber while prying with J 28585 or a large screwdriver, to prevent damage to VSS bore.

  12. Use J 28585 or a large screwdriver in order to lift the differential carrier. Pry up on the vehicle speed sensor reluctor wheel through the sensor hole in the case extension.

  13. Object Number: 10522  Size: SH
  14. Note the dial indicator reading before changing the carrier thrust washer (714).
  15. • If the dial indicator reading is less than 0.12 mm (0.005 in), install the next smaller size thrust washer, then recheck.
    • If the dial indicator reading is greater than 0.62 mm (0.025 in), install the next larger size thrust washer, then recheck.
    • If the dial indicator reading is 0.12-0.62 mm (0.005-0.025 in), the thrust washer is correct.
    • Refer to the Differential Carrier/Case Thrust Washer (714) Selection Guide in End Play Specifications .
  16. Remove J 8001 , J 25025-8 and J 26958-10B .