Flexplate/Torque Converter Vibration Test

This procedure only checks for a misbalance of the flex plate and or torque converter. Internal damage of the torque converter cannot be isolated by this procedure.

^ Tool Required:
- Crankshaft Hub Holding Adapter

1. Start the engine.
2. Observe the vehicle for vibration with the engine at idle speed and the transmission in PARK or NEUTRAL.
3. Turn OFF the engine.
4. Raise and suitably support the vehicle.
5. Remove the torque converter bolt access plugs from the following components:
- The oil pan
- The bell housing





6. Remove the flex plate-to-torque converter bolts.
- Use a flat bladed tool to engage the flex plate tooth and rest against the transmission housing while loosening flex plate-to-torque converter bolts.
- Discard the flex plate-to-torque converter bolts.
7. Rotate the torque converter 60° (1/6 turn).

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.

a. Install the flex plate-to-torque converter bolts. Hand start the flex plate-to torque converter bolts. Use a new flex plate-to-torque converter bolts with retaining compound removed from first three threads.
- Tighten the flex plate-to-torque converter bolts to 30 Nm (22 ft. lbs.) while holding flex plate with a flat-bladed tool.

NOTICE: Always use the correct fastener in the proper 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 OTHERWISE SPECIFIED, do not use supplemental coatings (paints, greases, or other corrosion inhibitors) on threaded fasteners or fastener joint interfaces. Generally, such coatings adversely affect the fastener torque and 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.

b. Install the torque converter bolt access plugs to oil pan and the bell housing.
c. Lower the vehicle.
d. Start the engine and check for vibration. If vibration still exists repeat this procedure until best possible balance is obtained.