The torque converter allows the engine to idle if the cars is stopped even though the transmission provides a equipment engaged. Since the name indicates, the torque converter converts (amplifies) the enter torque of the engine into the next output torque. This certain characteristic of the torque converter is impossible https://torque-converter-clutch43074.thelateblog.com/34483908/5-simple-statements-about-torque-converter-clutch-explained