A/T - Chirping Noise In Engine Compartment

9208buick01

Bulletin: 91-7-4
Date: Dec. '91
Ref. No.: 91-285-7A
Corp. Ref. No.: 137106


SUBJECT: TRANSAXLE MOUNT CHIRPS (REPLACE TRANSAXLE MOUNT BUMPER WITH NEW BUMPER)

MODELS AFFECTED: 1990 - 91 SKYLARK WITH 3300 AND 2.5L ENGINES


CONDITION:

Chirping noise in engine compartment.

CAUSE:

Transaxle mount bumper rubs against mount.

CORRECTION:

Replace transaxle mount bumper with new bumper. Refer to "Parts Information" for vehicle application and updated part number.

IMPORTANT:

Before transaxle mount bumper is replaced, be sure the bumper is the source of the noise. Coat the bumper with a silicone base grease and test drive vehicle. If noise is no longer evident, replace the bumper.

1. Remove transaxle mount from the vehicle. Refer to appropriate Service Manual and Section for procedure.

Figure 1:

2. Place the mount in a vise. Refer to Figure 1.

3. Remove bumper retaining nuts (if not removed during transaxle mount removal).

Figure 2:

4. Remove bumper. Lift up on the inner mount assembly until the bumper can be removed. Refer to Figure 2.

5. Install new bumper by lifting up on inner mount assembly.

6. Install bumper retaining nuts.

7. Remove mount from vise.

8. Install transaxle mount in the vehicle.


PARTS INFORMATION:

Model VIN
Bumper
Year Break Engine Transaxle

Part Number

1990 Skylark All 2.5L 3T40 - Auto 22575851
1991 Skylark SOP - MM643948

1990 Skylark All 3300 MD9 - Auto 22577698
1991 Skylark SOP - MM643948

Parts are currently available from GMSPO.

WARRANTY INFORMATION:

Labor Operation Number: Tl790
Labor Time: .8 Hour for 4 cylinder engines with Automatic Transmission
1.0 Hour for 6 cylinder engines with Automatic Transmission
Trouble Code: 92