By mechanically linking the turbine to the pump, it creates a ‘lock-up’ condition, essentially reworking the fluid coupling right into a rigid coupling, akin to your locked manual transmission clutch. During the closed posture, the torque converter clutch decreases fluid supply for the torque converter, allowing controlled slippage to occur. https://emiliohqssr.get-blogging.com/34782239/considerations-to-know-about-torque-converter-clutch