Tools Required

WARNING: This page is about a different car, the 2008 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.

J 25025-7A Dial Indicator Post. See Special Tools .
J 28585 Snap Ring Remover
J 8001 Dial Indicator

Fig 1: View Of Case Extension Seal

Courtesy of GENERAL MOTORS CORP.

Inspect the case to case extension seal (126).
Inspect the case extension mating surface for damage.

Fig 2: View Of Case Extension Components

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Install the following parts:
- The selective washer (133)
- The thrust washer (132)
- The case extension seal (126)
- The case extension (134)

Fig 3: Identifying Case Extension Bolts

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Apply pip thread sealant GM P/N 12346004 to bolt threads before installation. Install the case extension bolts (128, 129).
Hand tighten bolts (128, 129) until case extension (134) is seated onto case.

Fig 4: Measuring End Play Clearance Using J 25025-7A, J 8001 & J 28585

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NOTE: Failure to ensure that proper end play clearance exists, could lead to internal component damage.

Install the long J 25025-7A and the J 8001 . See Special Tools .
Position the dial indicator with the stem contacting the output shaft (112). Set the dial indicator to zero.
Insert the J 28585 through the vehicle speed sensor bore and lift the speed sensor rotor for measurement. Protect the bore with a piece of wood or a suitable piece of plastic.
Proper end play clearance is 0.15-0.65 mm (Eng. Spec.).
Record measured specification and, if necessary, adjust the clearance with the proper thickness selective thrust washer on reassembly. Refer to step 3.
Remove the dial indicator set and the post.

Fig 5: Identifying Case Extension Bolts & Studs

Courtesy of GENERAL MOTORS CORP.

NOTE: Refer to Fastener Notice .

Install the stud (127).
Tighten:
- Tighten the bolt (128) and the stud (127) to 50-55 N.m (37-40 lb ft).
- Tighten the bolt (129) to 20-27 N.m (15-20 lb ft).