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Old 11-05-2017, 08:33 PM   #2
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Join Date: Aug 2006
Location: Montezuma, Iowa
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Re: Speedometer issues

Originally Posted by Maggro View Post
I have a 69 c20 Suburban with a th400. The speedometer is good and accurate for about 10 miles on the highway then starts to jump around. It then slowly starts to read slower and slower until it dies completely. I have replaced the cable and still the same issue. Anyone know what might be causing this.
Thanks, Mondo.

That's a new one on me.... Seems like if it died it would stay dead. If you stop and take off again does it come back to life or do you have to leave it set for a while?

I will have T-Bone take a look at this thread and see if he has any ideas.


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