Trans Am Information > Interior

Speedometer Noise

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I couldn't find a similar post regarding speedometer noise, so I started this new one.  My 1980 Trans Am speedometer has an annoying clicking sound that increases and decreases with speed, so I am thinking the speedometer cable needs lubricating.  The needle is smooth and does not jump, just makes noise.  My thoughts are to remove the dash to access the cable connection to the back of the dash and spray graphite into the cable housing.  What I have read on the internet is to pull the cable and coat with light grease but I am not sure I have the ability to do that.  Could anyone advise? I live in Grand Forks North Dakota and I don't think any mechanics or dealerships know how on work on a car of this vintage.  Every time I have had it worked on it comes back with additional issues or scratched paint. 

Is the clicking coming from inside the car or does it seem to be an external noise?

If it's inside:

If you can, definitely try to remove it and once out, verify that the cable is in fact not the issue....oil or grease it up how ever you see fit...put it back in and if it doesn't go away then it may be an issue inside the cluster....maybe the mileage counter or the gearing inside the speedo.

I have never had this issue before but those are things I would to try and diagnose the problem.

If it's outside, then it may be the small plastic gears that go into the transmission but I'm really thinking its not that...I would disconnect the cable from the tranny and speedo and start with that.

Well, my current issue fits right in here.  My speedometer has started squeaking and it's definitely coming from the speedometer itself.  Sure sounds like plastic wheels/gears that's making the noise.  Without having to remove the entire cluster, is it possible to remove just the plastic glass covering the speedometer so I can perhaps squirt a little lubricant inside?  Course, not sure if that would work.  Is the plastic glass a one piece unit covering all the gauges in the '78's?

One piece lens, dash bezel to come off, by that stage you simply lower the steering column and take gauge cluster out. Could be speedo gauge or the cable where it pokes in, shot of something like lanolin or sewing machine oil and maybe a blob of grease on the tip before reinstalling.
Of course, that may not help if speedo internals are worn or damaged.

Thanks Wallington! 


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