My spedometer gets kinda jumpy on me at freeway speeds.
I don't know exactly how fast but once it gets up to 60 ish it kinda jumps around. I had it at jumping between 70 and 75 and was getting passed alot so i don't think I was near that speed. I can never find one of those "your speed is sign" to check it out.
Is it definatly the speedometer or can something else be going wrong?