Engine Idle Vibration

Engine idle vibration

Diagnostic Procedure:

1. Low ATF level

2. Shift solenoid valve D defective

3. Drive plate defective or transmission misassembled

4. Engine output low

5. Torque converter clutch piston defective

6. ATF pump worn or damaged

7. Lock-up shift valve defective

8. Misassembled engine and transmission mount

Also check for:

- Check the ATF level, and check the ATF lines for leakage and loose connections. If necessary, clean the ATF lines.
- Check for a stored DTC, and check for loose connections.
- Test the shift solenoid valve function with the HDS.
- Inspect shift solenoid valve D for seizure, and the O-rings for wear and damage.
- Check the transmission and the drive plate installation.
- Check the drive plate for wear and damage, if the drive plate is worn or damaged, replace the drive plate.
- Check the engine control system.
- Replace the torque converter assembly.
- Check the line pressure.
- Improper alignment of the ATF pump and the torque converter housing may cause ATF pump seizure. The symptoms are mostly an rpm-related ticking noise or a high pitched squeak.
- Be careful not to damage the torque converter housing when replacing the main ball bearing. You may also damage the ATF pump when you torque down the main valve body. This will cause ATF pump seizure.
- Install the main seal flush with the torque converter housing when replacing the main seal. If you push it into the torque converter housing until it bottoms out, it will block the fluid return passage and result in damage.
- Check the lock-up shift valve in the regulator valve body.
- Adjust the transmission and engine mounts by loosening and retightening the mount bolts.