For more info concerning the torque converter, study also the report How a torque converter performs. Modern torque converters have electronic Charge of the clutch Procedure. The force in the torque converter clutch is controlled by way of a main regulator valve that is piloted by a solenoid (see photos https://torque-converter-clutch31851.theobloggers.com/40514204/torque-converter-clutch-no-further-a-mystery