Locked Phase: With the clutch engaged, the torque converter transitions from the fluid coupling to some mechanical coupling, doing away with slippage and improving upon drivetrain efficiency. Even a negligible number of oil in use, under centrifugal power of rotation can begin to press the piston and drag the clutch. https://torqueconverterclutch21740.getblogs.net/66828146/fascination-about-torque-converter-clutch