Hey guys! Been a while since my last post. I've just put in a set of GM 3.73 gears form my factory 3.42's that came factory w/ the y87 package. I have the Hypertech power programmer 3, but it dont have a 3.73 gear option. It only goes up to a 3.42 gear. Now i have to adjust my tire heigth to correct it. I know it will still be off by 1 or 2 mph which i cna deal with. My tires are Nitto 245/50/16's. So if somone could tell me wut to set my tire heighth at to calibrate it better let me know. Or somone w/ a v6 who has 3.73 gears let me know at a certain MPH wut RPM your car is running at.
Example: 75mph = 2500RPM and so on
Well thanx guys for any help you cna give me.