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Old 05-03-2013, 08:28 AM   #1
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Speedometer bounces

The speedometer bounces pretty good when I gas it and will steady after a few minuets of driving. Any suggestion and or steps I should take to diagnose. I'm not mechanically inclined so yea...
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Old 05-03-2013, 08:40 AM   #2
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The speedometer bounces pretty good when I gas it and will steady after a few minuets of driving. Any suggestion and or steps I should take to diagnose. I'm not mechanically inclined so yea...
Well it could be a few things

On the transmission there is a cable that goes up to the speedometer that may be loose (most likely not) but I would check it.

Next is the where the cable connects to the back of the speedometer (again most likely not)

Last is the spring in the speedometer is starting to go bad (Most likely)

At least in my simple little mind

What year and motor Pony do you have and Welcome to the forum
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Old 05-03-2013, 10:12 AM   #3
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Thank you. Got a 68 straight 6. Guess ill replace the speedometer and replace the dash inlay and such too.
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Old 05-03-2013, 11:18 AM   #4
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Thank you. Got a 68 straight 6. Guess ill replace the speedometer and replace the dash inlay and such too.
Nice car I have a 68 also 289 car. I would check the connections first just cause the price is right. Somebody may chime in and say something else so don't go buy anything just yet.
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Old 05-03-2013, 02:27 PM   #5
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WAIT!!!! Disconnect the speedo cable from the speedo end then pull the cable out of the center of the cable housing. Clean it off and lubricate it with speedo cable grease. I am 98% sure you'll fix the bounce. It gets better as you speed up because you are overcoming the friction and whatever grease is left is warming up and getting thinner.
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Old 05-03-2013, 02:35 PM   #6
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Cable looks like this.

I know they make speedo cable lube, but I guess lithium grease will work in a pinch.
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Old 05-03-2013, 03:03 PM   #7
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WAIT!!!! Disconnect the speedo cable from the speedo end then pull the cable out of the center of the cable housing. Clean it off and lubricate it with speedo cable grease. I am 98% sure you'll fix the bounce. It gets better as you speed up because you are overcoming the friction and whatever grease is left is warming up and getting thinner.
See I knew someone smarter then me would chime in I didn't think about lubing the cable
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Old 05-03-2013, 04:57 PM   #8
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Thanks for the suggestions! Will purchase the lube this weekend and give her a go Tuesday when I'm off.
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