The impeller is connected to the housing along with the housing connected to the motor shaft. It's curved and angled vanes. It rotates with the motor velocity and is made of automatic transmission fluid. When it rotates Along with the motor, the centrifugal force would make the fluid shift outward. https://trevorntvwu.onzeblog.com/34285234/5-essential-elements-for-torque-converter-clutch