Hello all,

I have read several posts about various speedometer issues however I still have a few questions as I try to diagnose and remedy my issue. My recently purchased 2008 California Special speedometer is off by about 10% so when I am on the freeway it says I am doing 80mph when my GPS says I am doing 72. Likewise for lower speeds. As far as distance goes, it also reads high. When I go 10 miles on the GPS the odometer reads 10.7 miles. It bugs me enough that I would like to get it...

2008 GT CS speedometer issue (inaccurate)