The Charge of the oil tension while in the lock-up clutch is done via two valves: the relay valve plus the signal valve. In this type of arrangement the signal valve controls the force on 1 aspect on the relay valve, which controls the tension from the lock-up clutch. By https://torqueconverterclutch86306.canariblogs.com/little-known-facts-about-torque-converter-clutch-49107177