With the 3-passage torque converter, two passages are utilized for transmission oil (ATF) movement through the torque converter and for clutch cooling, whilst the third passage is utilized independently to control the lock and unlock of your clutch. In a two-passage torque converter clutch actuation procedure (as in the images https://torqueconverterclutch97418.blogginaway.com/34615113/5-essential-elements-for-torque-converter-clutch