Hello, I have 2005 Corvette and when I try to use the Gear/Tire Wizard I get crazy results if I enter anything besides 1.00 as the Gear Ratio. I'm running 27.8 inch tires and 3.73 gears but if I program that the car bucks and accelerates on it's own. Seems to work OK using 1.00 but speedo is off a bit. Anyone seen this before or know if it is anything to be concerned with?

Thanks in advance,