Together with the a few-passage torque converter, two passages are employed for transmission oil (ATF) circulation throughout the torque converter and for clutch cooling, though the 3rd passage is employed independently to regulate the lock and unlock with the clutch. An overheating transmission can spell problems for the torque converter. https://torque-converter-clutch09741.dreamyblogs.com/34337603/everything-about-torque-converter-clutch