S (stall level): On this issue the turbine speed is zero along with the impeller is rotating; the efficiency during the stall point is minimal, all over 50%, which suggests that 50 percent of the ability coming in the motor is dropped as a result of friction and dissipated as https://torque-converter-clutch75286.blogoscience.com/40247449/5-tips-about-torque-converter-clutch-you-can-use-today