In the event the clutch is disengaged, the torque converter will allow the engine to rotate with out stalling. While the car or truck is slowing and approaching a stop, the TCC's application is unwanted. Much like the clutch on a guide transmission, it will cause the motor to stall. https://elliotbfdbx.onesmablog.com/details-fiction-and-torque-converter-clutch-74887146