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Old 08-27-2019, 06:55 AM
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fixing Chevy odometer '66 Nova

My speedo works, but not my odometer. Is there a way to repair this? Anyone ever do this?

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Old 08-28-2019, 08:54 PM
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Anyone?????
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Old 08-29-2019, 04:56 AM
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Someone may have tried to set the odometer back or otherwise modify it, and broken something in the process. However, I don't believe its a DIY job because you won't be able to get the right internal parts.

Just do an online search and you will find several places that repair speedometers, or maybe also have a replacement. There are also several hard copy catalogs that have parts for classic Chevy vehicles, but I don't recall getting one for the '66 Nova.

Bruce
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Old 08-29-2019, 07:06 PM
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Its pretty likely that any speedo of that era will have a used part that can be installed as a replacement.

Be it a gear, or what have you there is bound to be some interchange in them

They are not that complicated.
Also as Bruce stated, and I agree with him, it could be a case of having been taken apart and just not re assembled correctly ,or someone broke a piece.
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Old 08-30-2019, 09:03 AM
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You can send it to these guys Palo Alto Speedometer: Repair, Restoration, and Sales of Automobile Gauges

I have never used them but plan on it and spoke with them about the one in my Skylark and they seemed very professional.

Brian
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Old 08-30-2019, 09:36 AM
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Those speedos are simple. Pull it out and look to make sure the clip that holds the Odometer in place is doing its job and that all of the locators are lined up and are sitting over the metal edge and locked in place. When you take it out of the cluster you'll see what I mean. Make sure all the drive gears are engaging. If you can't visually see whats wrong then a internal gear in the odometer may be bad. If you sen it out make sure they replace the Brass bushing at the back. All of this will make sense when you have it out.

Boy back in the day I used to spin a lot of speedos back for the Used Car Dept!. I even spun a very low mileage repo Mustang forward so it would stay on the lot longer for advertising!! Boy, the auto business used to be interesting!!

BB
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Old 08-30-2019, 10:01 AM
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Quote:
Originally Posted by boothboy View Post
Those speedos are simple. Pull it out and look to make sure the clip that holds the Odometer in place is doing its job and that all of the locators are lined up and are sitting over the metal edge and locked in place. When you take it out of the cluster you'll see what I mean. Make sure all the drive gears are engaging. If you can't visually see whats wrong then a internal gear in the odometer may be bad. If you sen it out make sure they replace the Brass bushing at the back. All of this will make sense when you have it out.

Boy back in the day I used to spin a lot of speedos back for the Used Car Dept!. I even spun a very low mileage repo Mustang forward so it would stay on the lot longer for advertising!! Boy, the auto business used to be interesting!!

BB
Yep, times were a bit different. Now with digital and even computer like screen I have to assume someone can just go into the computer and change it with a tap of a button?

Brian
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Old 08-31-2019, 01:27 PM
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Quote:
Originally Posted by boothboy View Post
Those speedos are simple. Pull it out and look to make sure the clip that holds the Odometer in place is doing its job and that all of the locators are lined up and are sitting over the metal edge and locked in place. When you take it out of the cluster you'll see what I mean. Make sure all the drive gears are engaging. If you can't visually see whats wrong then a internal gear in the odometer may be bad. If you sen it out make sure they replace the Brass bushing at the back. All of this will make sense when you have it out.
agreed. pull it out and look at it. i've replaced my speedo in 58 truk twice, both times i reset the mileage to it new born on date, when i did the total rebuild of 58 truk. mechanical speedo is very basic

american speedo cables rotate at 1000 revolutions per mile or 1000 rpm at 60 mph. a magnet and air gap make the speedo needle move. worm gear reduction mechanically turns the odometer. you can 2 worm gear speed reductions in my 58 odo drive

just don't buy a new one, repops are crapola
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