Along with the a few-passage torque converter, two passages are useful for transmission oil (ATF) move throughout the torque converter and for clutch cooling, whilst the third passage is applied independently to control the lock and unlock with the clutch. Very low force inside the torque converter will cause slippage, https://torque-converter-clutch68901.creacionblog.com/33799446/torque-converter-clutch-no-further-a-mystery