Modern torque converters use electro hydraulic control to the lock-up clutch. The hydraulic circuit which locks/unlocks the torque converter clutch is managed working with hydraulic valves. The valves are actuated instantly or indirectly by solenoids. M (optimum efficiency place): On this position the torque converter hits its highest efficiency as https://torque-converter-clutch28368.bloggerswise.com/41352323/what-does-torque-converter-clutch-mean