The engagement and disengagement of the lock-up clutch will depend on the route the fluid enters the torque converter. The automated transmission fluid can enter either with the front with the lock-up clutch or between the impeller and turbine, driving the clutch. To learn more about the torque converter, read https://chancerwxxv.nizarblog.com/34414428/torque-converter-clutch-no-further-a-mystery