Torque Converter Clutch Does Not Operate Smoothly; Torque Converter Clutch Does Not Engage or Disengage (A/T)

Torque converter clutch does not operate smoothly; torque converter clutch does not engage or disengage

Diagnostic Procedure:

1. Shift solenoid valve E 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

7. Input shaft (mainshaft) speed sensor defective

8. Output shaft (countershaft) speed sensor defective

Also check for:

- Check for a stored DTC, and check for loose connectors.
- Inspect shift solenoid valve E operation with the HDS A/T Shift Solenoid Valve Test, Replacement, and Shift Solenoid Wire Harness Replacement
- Inspect A/T clutch pressure control solenoid valve A with the HDS.
- Inspect shift solenoid valve E for seizure, and the O-rings for wear and damage.
- Inspect the A/T clutch pressure control solenoid valve filter/gasket and the O-rings for wear and damage, and inspect the solenoid valves for seizure.
- Check the input shaft (mainshaft) speed sensor and the output shaft (countershaft) speed sensor installation.
- Replace the torque converter.
- Check the lock-up control valve in the main valve body for free movement, and check the lock-up control valve spring for wear and damage.
- Check the lock-up shift valve in the regulator valve body for free movement, and check the lock-up shift valve spring for wear and damage.