S (stall stage): With this level the turbine speed is zero and also the impeller is rotating; the efficiency while in the stall position is minimal, all-around 50%, which implies that half of the ability coming from the motor is shed by friction and dissipated as warmth; at this point https://torqueconverterclutch85173.onzeblog.com/34284944/torque-converter-clutch-options