Front Differential Carrier End Play Check (FWD Only)

Tools Required:

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

Fig 1: View Of Case Extension Assembly & Bolts
Courtesy of GENERAL MOTORS CORP.
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.
NOTE: Refer to FASTENER NOTICE .
5. Install only 2 of the 4 case extension bolts (5).

   Tighten:  Do not torque the bolts. Tighten them only until the case extension is fully seated.

Fig 2: Installing J 25025-8, J 26958-10A & J 8001 To Transmission Case
Courtesy of GENERAL MOTORS CORP.
6. Position the transmission so that the case extension is facing upward.
7. Install J 25025-8  , J 26958-10B  , and J 8001  . See Special Tools .
8. Set the dial indicator to zero.
NOTE: Use a piece of wood or rubber while prying with J 28585 or a large screwdriver, to prevent damage to VSS bore.
9. Use J 28585  or a large screwdriver in order to lift the differential carrier. See Special Tools . Pry up on the vehicle speed sensor reluctor wheel through the sensor hole in the case extension.
Fig 3: Measuring Differential Carrier/Case Thrust Washer
Courtesy of GENERAL MOTORS CORP.
10. Note the dial indicator reading before changing the carrier thrust washer (714).
    • 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 .

11. Remove J 8001  , J 25025-8  and J 26958-10B  . See Special Tools .