After installing a set of HD wheels which seemed to be about ~1"+- taller than my stock L wheel my speedo seems to read a little slow compared with my hand held GPS. Is this adjustable in the computer???? I had no idea, and what about shift points do I need to worry about these? The truck doesn't seem to drive different enough for me to tell. What could this affect on shifting? - Confused

 

As a result of the taller wheels the speedo will be off a bit (not too sure of the ratio). That can easily be changed with a chip. The chip would have to be burnt to recalibrate the speedo for the larger tire size. Taller tires will have no effect on shifting or shift points at all. Hope this helps.


Cypri