The control of the oil pressure during the lock-up clutch is done as a result of two valves: the relay valve plus the sign valve. In such a arrangement the signal valve controls the pressure on just one side of your relay valve, which controls the stress from the lock-up https://torque-converter-clutch32952.educationalimpactblog.com/55911072/helping-the-others-realize-the-advantages-of-torque-converter-clutch