The control of the oil pressure from the lock-up clutch is done by two valves: the relay valve and also the signal valve. In such a arrangement the signal valve controls the strain on one aspect on the relay valve, which controls the stress during the lock-up clutch. By default, https://torque-converter-clutch19527.rimmablog.com/33376379/torque-converter-clutch-no-further-a-mystery