Now that's a crap shoot Cannucky. Is it a loss, medium or tight converter. An old cogger once told me what you do is drive down the highway at 3000 RPM and let off the gas pedal, just a little, and you can feel the converter slippage and see it on the tach. I figure that the one I'm running is about 200-300 RPM therefore 10% therefore medium. I don't know for sure cuss this is my first auto, everything up till now have been 4 speeds.:read2: