S (stall issue): With this issue the turbine velocity is zero and also the impeller is rotating; the efficiency within the stall level is bare minimum, all-around 50%, which means that 50 % of the ability coming in the motor is misplaced by friction and dissipated as heat; at this https://myleshvcgm.digitollblog.com/34065699/torque-converter-clutch-an-overview