S (stall level): With this level the turbine velocity is zero as well as the impeller is rotating; the effectiveness inside the stall position is minimal, all-around 50%, which implies that 50 % of the power coming through the engine is lost through friction and dissipated as heat; at this https://torqueconverterclutch83715.bloginder.com/34642070/torque-converter-clutch-no-further-a-mystery