Torque Converter Clutch Does Not Engage

Torque converter clutch does not engage

Shift solenoid valve C defective

A/T clutch pressure control solenoid valve D defective

Drive plate defective or transmission incorrectly installed

Torque converter clutch piston defective

Torque converter defective

Torque converter regulator valve defective

Lock-up shift valve defective

Lock-up control valve defective

Notes

Inspect the shift solenoid valve C function with the HDS Shift Solenoid Valve C Test and Replacement.

Notes

Check for a seized shift solenoid valve, and inspect the O-rings.

Notes

Inspect A/T clutch pressure control solenoid valve D with the HDS A/T Clutch Pressure Control Solenoid Valve A, B, C, and D Test.

Notes

Check for an incorrectly installed transmission, and check the drive plate for wear and damage. Replace the drive plate if it is worn or damaged.

Notes

Replace the torque converter.

Notes

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, use the proper tools.

Notes

Check the torque converter regulator valve and the lock-up control valve in the regulator valve body for free movement. If the valves do not move, replace the regulator valve body.

Notes

Check the lock-up shift valve in the main valve body for free movement. If the valve does not move, replace the main valve body.