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[02_Demon_GT]

I have a 2002 Mustang GT I just put a new motor, cams, headers, 3.73 gears, intake, ETC. and now my odometer is spinning faster putting more miles on my car than I am actually going. What can cause this and how do I fix it? I also just put a set of staggered 18" wheels on it. Thanks

 

[skyline247]

Welcome. The speedometer and odometer are impacted by a change in tire height and rear axle ratio, not the engine. I don't know if the new edges still use speedo gears or not, so someone will have to confirm how to recalibrate them. What was your gear ratio and tire size before you changed them and what is your tire size now?

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[madspeed]

the gaers are what affected your speedo