I just got my 03 screw lifted with 35s, Fabtech 7.5" lift and had my gears changed to 456s.My question is while on the freeway my speedometer reads about 10 mph than my actual speed and I was wondering what the best way to have it corrected would be.Another question is when the gears are changed does the installer or shop tune or change the computer to compensate for the gears and tires.I'm going monday to have the rear 5" block change to a 4" block to give the prerunner look and I would like to address these questions at that time.Thanks for the info

 

You can calibrate your speedometer/odometer with any of the popular aftermarket computer tuners like Superchips, Edge, Hypertech etc. I sort of doubt the tech that installed your gears will do it.
Also, welcome to the sight. How about getting us some pics of your ride, it sounds sweet!

 

Yea you will either have to get a tuner, or I think Super Lift makes just a speedo calibration module.

 

Thanks for the info fellas I'll get some pics as soon as possible.