cable could be loose or faulty speedo..
the spring in there is just out of whack...its not expensive to get it replaced I don't think. Mine does the same thing
Needs new speed sensor or if it has a cable to the speedometer it needs to be replaced along with the housing.
it depends on what it is doing, does it not work at all? or does it jump around? could be the plastic speedo gear in the transmission, or it could be your speedometer itself. i have had a problem with mine and i need to replace my speedometer, the back assembly has gone bad. it jumps around. mazurlaser@aol.com
I had 91 crx with the rpm needle would jump around sometimes. Then my distributor went out and I replace it and the problem did not come back. ---------- The speedometer cable probably needs to be lubricated with graphite powder. Don't know how to access the cable though. I have the same problem on my 94 si, but strangely, the odometer does seem to be working fine.
Would need the year of your vehicle, as well as make and model, in order to determine whether yours has a mechanical or an electronic speedometer. Each type of mechanism has a very different set of causes which could lead to what you're describing.
it jumps around.
jumps
A frog.
he jumps
a crazy boy who jumps around
They run around and then jumps on the animal that the jaguars attacking
I see no answer yet nov17 2012. I have same problem on 86 astro. Its got 66000 miles. Its not always noisy. Don't know what starts noise. It also sometimes jumps around past 60 mph. Don't know if oiling it will help.