Pump (Impeller): The driving member that may be attached for the engine. It spins Together with the motor and moves transmission fluid within the torque converter. The stator sends the fluid coming back from the turbine to your pump. This increases the performance from the torque converter. Note the spline, https://brooksxeebx.laowaiblog.com/33229271/new-step-by-step-map-for-torque-converter-clutch