S (stall stage): in this issue the turbine pace is zero and the impeller is rotating; the efficiency during the stall stage is minimum amount, around 50%, meaning that 50 % of the ability coming in the motor is missing as a result of friction and dissipated as warmth; at https://torqueconverterclutch08428.activosblog.com/32969539/torque-converter-clutch-secrets