I have a 98' X-Cab F-150 with a 5.4 and 3.55 rears. Why doesn't the tuners for that year allow you to reccalibrate the speed odometer? What is the solution for guys with our year truck who want to change gears and/or tire size ? I plan on purchasing one soon but i don't want buy a $300-$400 tuner that doesn't allow me to do it all.Thanks for any help Guys.

 

I presented the same question awhile back, read this tread & it will help you out
tread

 

Thanks Uinthas! that answers my question, Now I can buy with a peace of mind. Thanks again.