Together with the a few-passage torque converter, two passages are utilized for transmission oil (ATF) flow from the torque converter and for clutch cooling, while the third passage is utilized independently to control the lock and unlock with the clutch. A torque converter is usually made of 4 main components: https://torqueconverterclutch08529.bloggactif.com/35252683/5-essential-elements-for-torque-converter-clutch