After chaning to 3.73 gears from 3.31, I Disabled the Use Vid. Final Drive Ratio set to 3.73, Changed my tire Rev's Per Distance 786.00, No Don't I need to rescale my shifts, If so could someone please explain on how to go about doing this, is there any other settings that need to be set. Thanks everyone. I think perhaps my shift issues at wide open throttle pertain to me never chaning the shift speeds. I've also Included my tune file. Remember this is the Base Tune file and my Diablo file is stacked ontop of this one. The Diablo programmer uses what ever tune file thats orginally in the computer and modifies only the fuel air spark so on, but leaves trans information unalterted and intact.