The control of the oil strain within the lock-up clutch is finished via two valves: the relay valve along with the sign valve. In this kind of arrangement the signal valve controls the stress on just one side from the relay valve, which controls the stress inside the lock-up clutch. https://torqueconverterclutch65285.dailyblogzz.com/34817892/how-torque-converter-clutch-can-save-you-time-stress-and-money