Noisy Speedo

[4tiresngas]

My speedometer works fine some days...max speed limit on post is 30mph. But other days (more often than not) the needle bouces all over the place and the speedo makes all kinds of noise.

I thought it had something to do with the speedo cable. So, I bought a new one...doesn't look as quality as the one I had. But, I installed it and there was not noise. Threw the old one away, and sure enough a day or two later, the same noise and bouncing started again.

If I get another old speedo, can I pull the needle and face plate off? I have white gauges.

Thanks,