The control of the oil pressure inside the lock-up clutch is finished through two valves: the relay valve as well as the signal valve. In this sort of arrangement the sign valve controls the strain on just one aspect of the relay valve, which controls the force inside the lock-up https://torque-converter-clutch85061.blogoscience.com/40531200/new-step-by-step-map-for-torque-converter-clutch