New tires on 4x4, used Superchips Flashpaq to change tire size to 35 inches by the manufacturer specs. Test drive and cruise doesn’t work now. I felt the speedo was still wrong. I down loaded a speedo app and checked it against my truck speedo to find it was 5 mph too fast. I feathered my tire height down to 33.24”. The cruise started working, the speedo was now corrected, and shifting was a lot better.