S (stall place): Within this level the turbine velocity is zero plus the impeller is rotating; the effectiveness inside the stall position is minimal, all around 50%, which suggests that 50 % of the facility coming through the engine is missing by means of friction and dissipated as heat; at https://jaidenlvbfg.jts-blog.com/33218471/little-known-facts-about-torque-converter-clutch