S (stall point): On this stage the turbine speed is zero and also the impeller is rotating; the effectiveness in the stall point is bare minimum, all around 50%, which implies that 50 % of the facility coming in the motor is misplaced by means of friction and dissipated as https://torque-converter-clutch42963.blazingblog.com/34002316/not-known-details-about-torque-converter-clutch