Torque Converter Clutch Does Not Operate Smoothly

Torque converter clutch does not operate smoothly

Diagnostic Procedure:

1. Torque converter clutch piston defective

2. Torque converter check valve defective

3. Lock-up control valve defective

4. Lock-up timing valve defective

Also check for:

- Replace the torque converter.
- Check the lock-up control valves.