The control of the oil tension during the lock-up clutch is finished through two valves: the relay valve and also the signal valve. In this type of arrangement the signal valve controls the force on one side in the relay valve, which controls the force within the lock-up clutch. By https://cristianvbcba.theideasblog.com/34744691/the-smart-trick-of-torque-converter-clutch-that-nobody-is-discussing