r6man

i went passed one of those speed things that cops put out and noticed my speedo was off by about ten mph. i just bought the car bout a month ago. i was wondering if this means the guy put gears in it. it does have new cobra rims but i dont think that would make the speedo be off by that much. i am bout to order a tuner and need to know if it has gears. help

stevednmc

Sounds to me like it does. Here is a link to help you out: http://www.paladinmicro.com/?frm=SpeedInGearCalc.htm

Also what size wheels and tires do you have installed?

ESABATM

could just mark the tire and count the drive shaft revs and divide