Using the 3-passage torque converter, two passages are utilized for transmission oil (ATF) stream through the torque converter and for clutch cooling, though the 3rd passage is used independently to control the lock and unlock in the clutch. And not using a clutch to lock up the torque converter, the https://torque-converter-clutch36890.ampblogs.com/the-ultimate-guide-to-torque-converter-clutch-70683425