The fins which make up the pump with the torque converter are connected for the housing, so they also flip at the same velocity as being the engine. The cutaway below displays how every little thing is connected In the torque converter. Without a clutch to lock up the torque https://torqueconverterclutch86307.full-design.com/5-tips-about-torque-converter-clutch-you-can-use-today-76107627