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borgpj

Speedometer Runs Wild

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Has anyone else had this experience: Horrible squealing noise under the gear shift area as speed increases, and speedometer erratic and wildly optimistic?

The noise comes and goes and varies depending on the speed.  I am guessing I have a frayed or dry or kinked speedometer cable that is oscillating within the cable housing, and the vibration is affecting the speedometer functioning. Would rather not have to replace my speedometer.  Here are the instrument readings cruising at about 65...

 

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Disconnect your speedometer cable before you break the needle!  Then lube or replace your cable.  Also check that the cable is secured at the transmission end with the set screw.

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+1 Disconnect both ends, use Specialty Graphite WD-40 (local hardware store), spray in the top until it runs out the bottom. Let sit so the liquid component evaporates leaving the graphite. reconnect & test. If Speedo issue persists, it's time for either another cable or time to service the speedometer at North Hollywood or Palo Alto.

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And if that doesn't do it, the problem is most likely inside the speedometer.  I had the same problem on my '73, and did a column on how to fix it.  PM me if lubing the cable doesn't cure it and I'll send you a copy.

 

mike

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Also check for sharp bends in the cable it should be routed with sweeping curves.

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