volareandgtcat
Well-Known Member
Hi all .. 1980 F body owner, super 6 .. got a problem and don't know why .. I was driving out in the county and my speedo was saying 80kms/hr .. but my gps was telling me I was doing 88kms/hr ..... after arriving home I took my daughters car out and the gps registered within 1 km/hr. at different speeds ...... what would account for the discrepancy? As far as I know everything is stock .. tranny, rear-end, and wheels. Any Ideas? thanks