Torque Converter Clutch Does Not Disengage

Torque converter clutch does not disengage

Shift solenoid valve C defective

Drive plate defective or transmission incorrectly installed

Torque converter clutch piston defective

Torque converter defective

Lock-up shift 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

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

Check the stall speed A/T Stall Speed Test.

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