Speedo jumping

[cougar]

This is a new one on me. After the tranny rebuild on my 92, the speedo started jumping up. All I've ever seen them do is drop. I went over all the connectors and made sure the wires didn't get pinched. The adapter and VSS are on there good and solid. Any ideas?

[bmoeller]

Pull the ratio box out, and see if it turns freely. Also check to see if the pins aren't smooth. If you have a different VSS laying around, you could check to see if it is working properly. Hopefully it isn't the speedo head with some bad teeth on the gears.

[cougar]

I was planning on picking up another VSS, the only thing I could think of that would make the speedo jump up. The adapter was recently replaced, but you never know.

[cougar]

Finally got round to it. The guys that did my transmission broke the VSS. Put a new one in and all is well.