Speedometer issue

[Joedetroit84]

I have a 2000 Tiffin Allegro Class A.  We've been on a cross country trip for the last 10 days. Two days ago I started the RV and drove away and noticed the speedometer indicator was bouncing back and forth from 0-50 and the over drive light on the shifter was blinking. I stopped the vehicle and shut it down in a parking lot. A few minutes later I started it and drove away and everything was back to normal. This has been happening every now and then for the last two days.  any ideas??

 

[Jubilee]

My first guess would be a soon to fail speed sensor(VSS). Easy fix. Usually 1 bolt and a wire connection. Second guess would be a wiring problem from VSS to ecm. Sometimes those wires get too close to exhaust on some vehicles.

 

[Joedetroit84]

Thank you. I will look into that. I just got home so I will check that first