Stally...AKA Stall Converter, what it does is increase the engine RPM without loading up the engine. Sort of like revving a manual with the clutch in, except that once it reaches it's stall limit, (the revs the engine gets to before the converter starts to transmit power to the wheels), it will pre load the transmission so it doesn't slam into gear when the accelerator is floored.
OLS108, you should really know what a stall converter does and why it is fitted before you open your mouth. If you drive a car without the need to push the accelerator through the floor every time, a standard torque converter is fine. If you think you need a "stally" to drive the car, learn how to drive. Or get a manual. Hang on....if you need a stally, you don't know how to drive a manual.