IDLE SHAKE/VIBRATION TRANSAXLE SERVICE MOUNT

Subject: NEW TRANSAXLE SERVICE MOUNT TO IMPROVE IDLE SHAKE CONDITION - 1982 J2000 MODELS WITH AUTOMATIC TRANSMISSION

Some 1982 J2000 models with automatic transmissions may exhibit dash or steering wheel shake at idle.

Vehicles exhibiting idle shake can be improved by the installation of a new transaxle mount (part number 14067053).

The installation procedures contained in this bulletin must be followed to achieve optimum performance of the new mount.

TRANSAXLE MOUNT REMOVAL

1. Disconnect negative battery cable.

2. Using a M6 x 1 x 65 bolt, insert bolt in hole at front right-hand engine mount to prevent mount mislocation during transaxle mount removal (see Figure 1).

3. Install engine support fixture (refer to page 7A-11 of the 1982 J2000 Shop Manual Supplement). Apply a preload on lift hook so that engine will not drop upon mount bolt removal.

4. Raise vehicle and remove left-hand horn assembly.

5. Remove lower three (3) bracket to transaxle mount bolts (see Figure 2).

6. Loosen outboard lateral transaxle mounting strut bolt (if equipped) (see Figure 3 on following page).

7. Loosen forward-most transaxle mounting strut bolt (see Figure 4 on following page).

8. Loosen two (2) right-hand rear engine mount retaining nuts (see Figure 5 on following page).

NOTICE: It is extremely important that Steps 6, 7 and 8 be performed as installation of the new mount will generate unwanted preload to the new mount as well as to the support struts.

9. Lower vehicle and remove the rear-most bracket to transaxle mount bolt

10. Remove the two (2) transaxle mount to body bolts, then remove mount.

SERVICE MOUNT INSTALLATION AND ALIGNMENT

1. Install new transaxle mount using the two (2) body bolts. Do not torque the bolts at this time, snug them up only.

2. Using the engine support fixture, adjust the engine height so that the mount bracket (lightly) contacts the transaxle mount.

NOTICE: Do not lift the engine into place by tightening the attaching bolts, as this may create undesirable loads on the mount.

3. Raise vehicle and install three (3) lower bracket to mount bolts and torque to 52 Nm (38 ft. lbs.).

4. Lower vehicle and install the rear bracket to mount bolt and torque to 52 Nm (38 ft. lbs.).

5. Remove engine support fixture.

6. With transaxle in neutral, observe the transaxle mount end gaps (see Figure 6). If end gaps are not equal front to rear, it will be necessary to insert a pry bar into the narrower of the two gaps to pry fore or aft. At the same time, torque the mount to body bolts to 61 Nm (45 ft. lbs.). Verify that end gaps are equal. If not, repeat Step 6.

NOTICE: Use caution when prying mount, as not to tear rubber. A blunt blade pry bar is recommended.

7. Raise vehicle and tighten two (2) right-hand rear engine mount nuts to 25 Nm (1 9 ft. lbs.).

8. Tighten transaxle mount strut to 54 Nm (40 ft.lbs.).

9. Tighten lateral transaxle support strut to 54 Nm (40 ft. lbs.).

10. Reinstall horn then lower vehicle.

11. Remove locating bolt from right-hand front engine mount.

12. Reconnect negative battery cable.

13. With engine at normal operating temperature, emergency brake applied and drive wheels blocked, all accessories on and transmission in drive. Visually inspect the foreward-most transaxle mount end gap. For optimal idle shake isolation, there must be a slight end gap remaining.

WARRANTY INFORMATION

Labor Operation K6721 Time Allowance .8 Hr.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.