With all the a few-passage torque converter, two passages are used for transmission oil (ATF) circulation from the torque converter and for clutch cooling, while the third passage is utilised independently to control the lock and unlock in the clutch. The torque converter clutch usually takes this system more by https://garrettgkjik.blogolize.com/5-simple-statements-about-torque-converter-clutch-explained-73033973