S (stall issue): On this position the turbine pace is zero and the impeller is rotating; the efficiency during the stall level is minimum amount, all over 50%, which implies that half of the ability coming with the motor is lost through friction and dissipated as heat; at this time https://torqueconverterclutch68887.ttblogs.com/13640154/torque-converter-clutch-can-be-fun-for-anyone