Flywheel Torque Converter Clutch Vibration Test Procedure - 4L60-E Transmission

NOTICE: Make sure to use the correct bolts/screws to secure the flywheel to the converter. If the bolts/screws are too long, they could bottom out in the lug nuts on the converter and dent the housing, causing internal damage to the converter.

REMOVE OR DISCONNECT
1. Start engine.
2. With engine at idle speed and range selector lever in "PARK" or "NEUTRAL," observe vibration.
3. Shut off engine.
4. Raise and suitably support vehicle.
5. Transmission converter cover bolts/screws.
6. Flywheel bolts/screws.
- Discard flywheel bolts/screws.
7. Rotate torque converter clutch 120° (1/3 turn).

INSTALL OR CONNECT

NOTICE: Always use the correct fastener in the correct location. When you replace a fastener, use ONLY the exact part number for that application. The Manufacturer will call out those fasteners that require a replacement after removal. The Manufacturer will also call out the fasteners that require thread lockers or thread sealant. UNLESS OTHER WISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors) on the threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and the joint clamping force, and may damage the fastener. When you install fasteners, use the correct tightening sequence and specifications. Following these instructions can help you avoid damage to parts and systems.

1. New flywheel bolts/screws.
- Hand start flywheel bolts/screws.
- Use new flywheel bolts/screws with retaining compound removed from first three threads.
- Tighten Torque converter bolts/screws to 63 Nm (46 ft. lbs.).
2. Transmission converter cover bolts/screws.

Tighten
- Transmission converter cover bolts/screws to 48 Nm (35 ft. lbs.).

3. Lower vehicle.
4. Start engine and check for vibration.