So I was driving my 61 Series II yesterday and hit a bump in the road and my speedo starting making this weird buzzing sound. I slowed down to a stop and then the noise stopped and continued on my way.

Took it for a spin this morning and got no more than a mile down the road they noise starting going again. I tried stopping to see if it would stop, but as soon as I started gaining speed again it came back on several times.

I read through some threads and have unscrewed the connection, cleaned it, lubed it and still not solving the problem. So now, I'm stumped.

Has anyone else had this problem or have any suggestions on a solution? Could it be the speedo itself gone bad. The speedo has never worked accurately since I've had it.

I've attached a quick video of the noise as well. I would say I was going roughly 10-15 mph at this time.

Thanks for the help!