Tire size - speedometer

Originally Posted by PhilD

Yes, a handheld can compensate for the different tire size. Would let you play with shift points, pressure, etc also. I didn't do it when I went to 37's, but did with 38's. In retrospect i would have done it for 37's also.

i adjusted the programming for my 37's, mileage is back to where it was with the original tires as well as having an accurate speedo. the tighter shifts and performance improvement make it even better .