The control of the oil tension inside the lock-up clutch is completed by means of two valves: the relay valve plus the sign valve. In this kind of arrangement the sign valve controls the strain on a person side in the relay valve, which controls the strain in the lock-up https://torque-converter-clutch21851.articlesblogger.com/56730024/the-2-minute-rule-for-torque-converter-clutch