Notice: Some Engine/Transmission combinations cannot be balance in this manner, due to the limited clearances between the transmission torque converter bolts and the engine. Be sure that the bolts do not bottom out in the lug nuts, or the transmission converter cover could be dented, and cause internal damage.

1. Start the engine.
2. Place the transmission in P (Park) or N (Neutral).
3. Run the engine at idle speed.
4. Observe the vibration.
5. Shut OFF the engine.

1. Remove the converter cover attaching bolts (if installed).
2. Remove the starter motor on vehicles equipped with 4.3L engines. Refer to Cranking System in Engine Mechanical.
3. Remove the converter to flywheel bolts.
4. Rotate the torque converter 1/3 turn (120 degrees).

1. Install the converter to flywheel bolts.

Tighten
Tighten the bolts to 63 N·m (46 lb ft).

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.

2. Install the converter cover bolts.

Tighten
Tighten the converter cover bolts to 33 N·m (24 lb ft).

3. Install the starter motor on vehicles equipped with 4.3L engines. Refer to Cranking System in Engine Mechanical.
4. Start the engine. Check for vibration.

Repeat the procedure until the best possible balance is obtained.