S (stall issue): During this point the turbine velocity is zero and also the impeller is rotating; the performance during the stall position is bare minimum, around 50%, meaning that 50 % of the ability coming from the motor is missing by means of friction and dissipated as warmth; at https://torqueconverterclutch10752.thezenweb.com/the-best-side-of-torque-converter-clutch-72019664