Using the 3-passage torque converter, two passages are employed for transmission oil (ATF) stream through the torque converter and for clutch cooling, even though the 3rd passage is utilized independently to control the lock and unlock with the clutch. The torque converter clutch requires this system more by addressing one https://edgarhgfcz.bloggazza.com/33004642/not-known-details-about-torque-converter-clutch