My Garmin and the odometer in the Healey were 20 miles difference on
the trip to San Diego and back.
If your speedo is jumping around then either the cable is to long
sticking out into the instrument or the cable is bad. If the end of
the cable sticks out to far it will damage the instrument and it will
need to be re built.
British Car Specialists
Stockton Ca 95205
On Jul 8, 2008, at 4:25 PM, Editorgary@aol.com wrote:
> In a message dated 7/8/08 3:48:07 PM, firstname.lastname@example.org writes:
>> Our Garmin (nuvo 200) indicates 3 mph lower than the Mini's or our
>> speedometer at highway speeds. The Healey's speedometer bounces
>> too much.
> Sounds about right; the Garmin is accurate and most cars' speedos
> read a few
> miles on the plus side, probably for liability reasons. If your
> speedo bounces around, maybe you've got a cable problem; most don't
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