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Speedometer calibration

midyearroadster427

Well-known member
Joined
Jul 25, 2004
Messages
190
Location
Massachusetts
Corvette
1967 Red 427 Roadster, 2012 Grand Sport Coupe
can someone recalibrate a midyear speedometer themselves?????? Has anyone done it, besides the professionals I mean?
 

magicv8

Well-known member
Joined
Mar 18, 2003
Messages
656
Location
Going too fast over the hill.
The speedo may not need to be recalibrated if it is in error by the same percentage at all speeds - in that case a simple change of plastic speedometer cable driven gear may do it - if not a not so simple change of both the driven gear and the trans drive gear will do it.

If the percent error varies with speed, IMO it will need to be serviced.
 

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