Together with the a few-passage torque converter, two passages are used for transmission oil (ATF) flow throughout the torque converter and for clutch cooling, though the third passage is used independently to regulate the lock and unlock on the clutch. An overheating transmission can spell trouble to your torque converter. https://torqueconverterclutch17862.losblogos.com/33103104/torque-converter-clutch-no-further-a-mystery