Inside of a torque converter you can find a minimum of three rotating components: the impeller, that's mechanically driven by the prime mover; the turbine, which drives the load; and also the stator, and that is interposed in between the impeller and turbine in order that it may change oil https://torque-converter-clutch41616.tribunablog.com/torque-converter-clutch-fundamentals-explained-48089418