I constantly read inquiries about speedometer problems when doing T5, other overdrives, transmission, rear end, and tire size changes. This can be remedied SO EASILY with a gps speedometer where whatever change is made makes no difference to the speedos accuracy. I keep waiting for a supplier to make an attractive bezel insert to complete the swap. No gears, no cables, just a dead accurate speedometer for under a hundred bucks. Ones who live where there are tunnels say they work there also.


Evan