The Charge of the oil tension during the lock-up clutch is done via two valves: the relay valve and also the signal valve. In such a arrangement the signal valve controls the stress on one particular aspect on the relay valve, which controls the strain while in the lock-up clutch. https://spencerkvbfh.azzablog.com/34420037/the-smart-trick-of-torque-converter-clutch-that-nobody-is-discussing