Pump (Impeller): The driving member that's connected for the engine. It spins Together with the engine and moves transmission fluid within the torque converter. The Charge of the oil stress during the lock-up clutch is done by way of two valves: the relay valve as well as the signal valve. https://torque-converter-clutch28494.blogsidea.com/40673224/not-known-details-about-torque-converter-clutch