Engine Idle Vibration

Engine idle vibration

Diagnostic Procedure:

1. Low ATF level

2. Engine output low

3. Torque converter clutch piston defective

Also check for:

- Check the ATF level, and check the ATF cooler line for leakage and loose connections. If necessary, clean the ATF cooler lines.
- Check the stall speed.
- Check the engine control system.
- Check the line pressure.
- Improper alignment of ATF pump and torque converter housing may cause the ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.