The torque converter allows the motor to idle if the cars is stopped While the transmission provides a equipment engaged. Since the title suggests, the torque converter converts (amplifies) the enter torque on the engine into a better output torque. This certain feature in the torque converter is not possible https://torque-converter-clutch19741.bleepblogs.com/34708756/torque-converter-clutch-no-further-a-mystery