1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

Speedometer misreading, how to fix?

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Old Apr 16, 2013 | 11:46 AM
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JonnyBoy101's Avatar
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Question Speedometer misreading, how to fix?

my speedometer goes up at about 35 mph but clearly I'm not going that fast or did not accelerate that quickly. any one know how to fix this?


thanks


tags: speedometer, misreading, not, working, help, going, fast, wrong, mph,
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Old Apr 16, 2013 | 11:56 AM
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t_g_farrell's Avatar
Waffles - hmmm good
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Swap in one from another cluster or for $$$ send it off to a speedo shop that can fix it. Finding
a used cluster is easy and lot cheaper.

You can try pulling the speedo out and using canned air to clean the speedo mechanism. Its pretty
delicate and works by a spinning magnet inside a bell with the pointer attached to the back of
the bell.

Theres a thread on here that has a lot of good stuff on the 1st gen speedos. Search and you
shall find.
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Old Apr 16, 2013 | 12:22 PM
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thanks, ill try to find that thread
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Old Apr 16, 2013 | 04:48 PM
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Check the cable for excessive grease where it plugs into the back of the gauge.
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Old Apr 16, 2013 | 11:45 PM
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I had a similar problem and it turned out to be a bad speedo cable, that would be my bet
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