S (stall position): With this point the turbine pace is zero and also the impeller is rotating; the efficiency from the stall position is minimum, all around 50%, which means that half of the power coming from the motor is missing through friction and dissipated as heat; at this time https://torque-converter-clutch00863.blogsumer.com/33197581/torque-converter-clutch-can-be-fun-for-anyone