Along with the three-passage torque converter, two passages are used for transmission oil (ATF) movement from the torque converter and for clutch cooling, while the 3rd passage is made use of independently to regulate the lock and unlock on the clutch. An overheating transmission can spell trouble for the torque https://jasperuiscl.qodsblog.com/34002014/new-step-by-step-map-for-torque-converter-clutch