Mid9 - My Speedometer Has Started Behaving Oddly
 

The speedo on my '76 has begun behaving oddly. I noticed yesterday that at a good rate of speed on the freeway; say 80mph or slightly higher, it was registering 45 mph. It wasn't erratic, just slow. It DOES return to zero at stops. At a lower rate of speed it is still off, say 30-35 when I am in fact traveling at about 55-60.

I am thinking it is the gauge itself and am wondering if there is anything I can DIY? Or is this an expensive, "Send-it-to-North-Hollywood-Speedometer" fix only? Anyone have any experience with this?

I sent mine to North Hollywood to be rebuilt a few years ago and they did a great job. I think I paid $125 to have the whole thing rebuild. I did not try to fix it myself (not anough patience)...

If its not erratic, and none of the other gauges are jumping, then it probably not the voltage regular.

Any cable noise coming from around the shifter?

This probably should be moved to the technical forum.

Yeah, I screwed up putting it here. No noise at all it just suddenly wouldn't go higher than the 45 mph. Nice and steady but wrong when it had always worked fine. I'll pop it out of the dash and check it out for anything obviously wrong with it, but I doubt I'll find anything.