I am new to FORScan and I would like to update the tire size. I originally had 35's but have since swapped to the BFG 37's. Has anyone done this and updated the truck through FORScan? I'd love to have a more accurate speedo and hoping it might reset the shift points to normal as well since the truck seems to be holding gears longer than before. If so, please drop the code in the comments or point me in the right direction . I saw the long Gen 3 thread about FORScan, but I didn't see anything on the tire size on my brief sift. Any info would be great, thanks.