The Charge of the oil tension while in the lock-up clutch is done via two valves: the relay valve and also the sign valve. In this type of arrangement the sign valve controls the force on 1 facet in the relay valve, which controls the tension within the lock-up clutch. https://beckettvbbay.smblogsites.com/34265405/the-best-side-of-torque-converter-clutch