S (stall level): On this point the turbine speed is zero as well as impeller is rotating; the effectiveness in the stall stage is least, close to fifty%, meaning that 50 % of the power coming through the engine is missing through friction and dissipated as heat; at this stage https://garrettqqnkj.elbloglibre.com/33954312/a-simple-key-for-torque-converter-clutch-unveiled