This post needs added citations for verification. Please aid increase this information by adding citations to reputable sources. Unsourced content may be challenged and taken off. The Charge of the oil pressure in the lock-up clutch is finished through two valves: the relay valve as well as the sign valve. https://torque-converter-clutch31964.madmouseblog.com/14465728/a-simple-key-for-torque-converter-clutch-unveiled