Torque Converter Clutch Does Not Operate Smoothly

Torque converter clutch does not operate smoothly

Diagnostic Procedure:

1. Shift solenoid valve D defective

2. A/T clutch pressure control solenoid valve A defective

3. Torque converter clutch piston defective

4. Torque converter check valve defective

5. Lock-up shift valve defective

6. Lock-up control valve defective

Also check for:

- Test the solenoid valve function with the HDS.
- Inspect the A/T clutch pressure control solenoid valve body gasket, the ATF feed pipes, and the O-rings for wear and damage.
- Inspect shift solenoid valve D for seizure, and the O-rings for wear and damage.
- Replace the torque converter assembly.
- Check the torque converter check valve in the regulator valve body.
- Check the lock-up shift valve in the regulator valve body.
- Check the lock-up control valve in the main valve body.