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Speedo bug bites again

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Old Jan 21, 2026 | 06:03 PM
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Default Speedo bug bites again

Took 67 out for a spin yesterday speedo was kind of bouncy then pegged at 0 and odo not registering either. Does this sound like gears or cable ? Im not very mechanical. All other gauges are working fine. 4th drive in it. Damn. 🤮
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Old Jan 21, 2026 | 06:19 PM
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Take cable off at trans...chuck up end of cable in drill..if it spins like the tach...put drill in reverse to see if speedo works...<<<I might be wrong on the direction of drill....if it works, take out the speedo gear on trans...its either there and stripped or missing...fell into trans
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Old Jan 21, 2026 | 06:23 PM
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Sounds like you need to pull the cluster and have it rebuilt
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Old Jan 21, 2026 | 06:41 PM
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starting to detect a pattern here. one issue followed by the next. you're going to have to get mechanical. or line up a mechanic to fix all the issues.. It's the same course we've all followed with our old classics. it comes with the territory.
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Old Jan 21, 2026 | 06:45 PM
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Originally Posted by 65hihp
starting to detect a pattern here. one issue followed by the next. you're going to have to get mechanical. or line up a mechanic to fix all the issues.. It's the same course we've all followed with our old classics. it comes with the territory.
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Old Jan 21, 2026 | 07:40 PM
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Now I remember I had to straddle a small branch in the road and heard it hit the underbody, could that have caused it?
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Old Jan 21, 2026 | 10:07 PM
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my speedometer did the same thing. pulled the driven gear out of the transmission and it was worn out. this is easy to do, just pull the speedometer cable out of the transmission. to replace it, just count the teeth and order another online. I got lucky and had the correct gear in my spare parts box.
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Old Jan 22, 2026 | 09:32 AM
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Originally Posted by 66sixtaillights
my speedometer did the same thing. pulled the driven gear out of the transmission and it was worn out. this is easy to do, just pull the speedometer cable out of the transmission. to replace it, just count the teeth and order another online. I got lucky and had the correct gear in my spare parts box.
Where is this tranny gear located on the tranny?
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Old Jan 22, 2026 | 08:12 PM
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Originally Posted by 67vertGWG
Where is this tranny gear located on the tranny?

Follow the cable..




Loosen small hex nut/bolt on side where cable is attached, rotate little clip...pull out 'bullet' with cable attached, or removed and the gear is on the end..do it carefully as its narrow..
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Old Jan 22, 2026 | 08:46 PM
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Originally Posted by 66jack
Follow the cable..




Loosen small hex nut/bolt on side where cable is attached, rotate little clip...pull out 'bullet' with cable attached, or removed and the gear is on the end..do it carefully as its narrow..
Excellent. Thanks!
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Old Jan 23, 2026 | 03:38 AM
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Originally Posted by 66jack
Follow the cable..




Loosen small hex nut/bolt on side where cable is attached, rotate little clip...pull out 'bullet' with cable attached, or removed and the gear is on the end..do it carefully as its narrow..
which gear are you referring to? Im guessing the plastic one?

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Old Jan 23, 2026 | 07:25 AM
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Yes, the plastic one. The color will indicate the number of teeth. You need to get one with the same number of teeth assuming it’s bad and the speedometer was reasonably accurate to start with. But not as good a possibility it’s that gear as is a bad cable or broken speedometer. Taking a drill set in reverse and attaching the chuck to the square end part of the cable after it’s removed at the transmission and spinning it will tell you if everything from there to the speedometer is in working order. The speedometer needle should rise in relation to the drill speed.

Last edited by DansYellow66; Jan 23, 2026 at 01:51 PM.
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Old Jan 23, 2026 | 01:35 PM
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The picture of the one you posted is the one i was referring to

What does 'your' gear look like?
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Old Jan 23, 2026 | 05:24 PM
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Originally Posted by 66jack
The picture of the one you posted is the one i was referring to

What does 'your' gear look like?
Not sure, have no way to get under car at present, but found a local shop that repairs lots of classic cars for a local museum and they said it shouldn't be a problem. When this weather clears out next week I'll see what they say.
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Old Jan 23, 2026 | 05:31 PM
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Your going to find a restored car is never done or all the short cuts someone took doing the last resto.
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