Modern torque converters use electro hydraulic control to the lock-up clutch. The hydraulic circuit which locks/unlocks the torque converter clutch is managed using hydraulic valves. The valves are actuated directly or indirectly by solenoids. A further concern that may arise is tough idling. If your car shudders or vibrates excessively https://torqueconverterclutch48035.humor-blog.com/32925331/getting-my-torque-converter-clutch-to-work