It might depend on the torque converter? I changed from an older design 10" Dynamic 3,500 stall that was good, but on the loose side to where it slipped fairly easy below the stall speed. The new converter is a custom (and expensive) tight 9" from Ultimate. It flash stall speed is close to 5,000 RPM, but I don't notice any slippage (more than a stock converter) in normal driving. It's nice for the street, but maybe too tight at the track?
