S (stall point): During this position the turbine speed is zero and the impeller is rotating; the efficiency inside the stall level is minimal, all around fifty%, which implies that 50 % of the power coming from the motor is lost as a result of friction and dissipated as heat; https://torqueconverterclutch86419.bcbloggers.com/33152673/what-does-torque-converter-clutch-mean