The control of the oil tension from the lock-up clutch is completed by two valves: the relay valve and the signal valve. In this sort of arrangement the signal valve controls the tension on just one side of your relay valve, which controls the strain while in the lock-up clutch. https://torque-converter-clutch65296.imblogs.net/83907858/the-5-second-trick-for-torque-converter-clutch