The engagement and disengagement with the lock-up clutch depends on the path the fluid enters the torque converter. The automated transmission fluid can enter both in the front with the lock-up clutch or in between the impeller and turbine, behind the clutch. It sits in between the motor and transmission. https://damienfpqqr.articlesblogger.com/56729688/little-known-facts-about-torque-converter-clutch