The control of the oil stress during the lock-up clutch is done via two valves: the relay valve as well as signal valve. In this kind of arrangement the signal valve controls the strain on a single aspect on the relay valve, which controls the pressure from the lock-up clutch. https://torqueconverterclutch51739.blog4youth.com/34883664/little-known-facts-about-torque-converter-clutch