More recent varieties of automatic transmission, such as semi-manual gearbox and CVT use other ways of electric power delivery, and don't include things like torque converters. In a very torque converter you can find at the very least 3 rotating things: the impeller, that's mechanically pushed with the primary mover; https://erickrycgi.gynoblog.com/33158440/the-torque-converter-clutch-diaries