S (stall point): On this stage the turbine pace is zero along with the impeller is rotating; the effectiveness inside the stall stage is least, all over 50%, which suggests that half of the facility coming within the engine is missing via friction and dissipated as warmth; at this point https://torque-converter-clutch66318.uzblog.net/torque-converter-clutch-no-further-a-mystery-47981861