I'm just curious how many of you out there had the speedometer adjusted after you increased your tire size. I'm looking at going from 31" to 33" and I'm pretty sure with that slight of a change I should be alright not changing it. I can do the math in my head. But if changing is easy I might do that .Ford says they will do it but suggest not to do it and there is no guarentee that it will work but have to pay either way.

Basically what do you suggest? Do it or not and if so have Ford do it or look for another place to do it?

Thanks

 

SCT Xcal2 tuner will do it.

I have a SCT Flip chip that does teh gear change and the tire change.

 

I didnt bother changing the speedo when i got 33's but If i was id get a tunner instead of doing it at the dealer****