The torque converter clutch comes into motion to mitigate the inherent inefficiency in the fluid coupling at higher speeds. Launch oil exiting through the turbine shaft forces the clutch off the cover surface. The 2-route converter then has flow when the release oil has divided the clutch from the cover. https://ricardowgklk.tkzblog.com/34038767/the-5-second-trick-for-torque-converter-clutch