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

Speedometer Goes Wild!!!

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Old 11-29-04, 04:08 PM
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Speedometer Gone Wild!!!

On cold mornings my speedometer doesn't read correctly. Everything under 40mph is normal, but once I hit 50 or so the speedometer goes to 140 and stays there. I also hear a knocking/whining when this is happening. It has also started to do this more often and in warmer weather.

Could this just be a bad cable/connection from the speedometer to the tranny (tighten the connection on tranny)?
Would WD-40 w/ graphite fix this?
Or should I just replace the speedometer cable?

Just looking for suggestions/solutions
Thanks

Last edited by x605p747R1; 11-29-04 at 04:16 PM.
Old 11-29-04, 04:11 PM
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sounds more like the speedo head is going bad.
Old 11-29-04, 04:42 PM
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Check your flex capacitor, sometimes jumping to warp speed has adverse effects on it.
Old 11-29-04, 04:47 PM
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Originally Posted by John64
Check your flex capacitor, sometimes jumping to warp speed has adverse effects on it.
I was hoping that was the issue.

WTB: Flux Capacitor. PM me Pleeaassee.
Old 11-29-04, 04:59 PM
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1.21 jigawatts!!
Old 11-29-04, 05:01 PM
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Originally Posted by CarlRx7
1.21 jigawatts!!

Post counter?
LOL.......
J/k!
Old 11-29-04, 09:15 PM
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i had a similar issue when i first got my 80. Previous owner thought it was the cable, so i replaced that only to find the stock one perfectly intact, and the speed still being crazy. So i snatched up a used speedo on Ebay, threw that in and voila.




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