:wavey: Hey all, just picked myself up a 1998 Ram 1500 and it came with 285/75/16's on it. As I was driving it home I noticed the Speedo and GPS were 6mph off, as in the truck was showing 6mph slower than reality. From my research, 1998 is a tough year because late models needed them to be programed. Mine was built in November of 97, but I can't seem to the speedo gear (if it has one). Does anyone have an idea? Any help would be much appreciated, I hate to see this truck rack up more miles than what it is actually traveling.