To learn more concerning the torque converter, read through also the report How a torque converter functions. Modern-day torque converters have electronic control of the clutch Procedure. The pressure in the torque converter clutch is regulated by using a main regulator valve which can be piloted by a solenoid (see https://torque-converter-clutch53073.bcbloggers.com/33402500/torque-converter-clutch-an-overview