What's a Torque Converter Clutch? A torque converter clutch is actually a system within the torque converter of an automatic transmission that locks the motor for the transmission at cruising speeds, cutting down slippage and increasing performance. Using the three-passage torque converter, two passages are employed for transmission oil (ATF) https://torqueconverterclutch09641.pointblog.net/torque-converter-clutch-for-dummies-77735838