I've got a weird one on my '80 Spit.
I drive the NYS Thruway to work. When I drive my Spit, early in the
drive the Speedometer reads the correct speed (70MPH @ 3400 RPM with OD,
verified by time over mile marker method) but approximately 30 miles
later, it reads low (63MPH @ 3400 RPM).
I verified that I was still going about the same speed at the end of the
trip that I was in the beginning so I know there is no slip in the drive
train.
Could this be a symptom of a slightly binding speedo cable? It does
bounce some at lower speeds but smooths out about 30MPH.
Has anyone else encountered this?
Kirby
'80 Spitfire
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