Locked Phase: With all the clutch engaged, the torque converter transitions from a fluid coupling to some mechanical coupling, getting rid of slippage and improving upon drivetrain performance. You can really feel this once the engine revs up when in gear, though the automobile won't accelerate. Typically you might want https://torque-converter-clutch31840.blogoxo.com/34417774/torque-converter-clutch-an-overview