I was wondering if anyone has any ideas whats wrong. Ok my stock guage cluster works fine oil temp and fuel guages tach all work fine.. But my speedometer works when ever the hell it wants to.. I cant find the problem.. I took the cluster out looked at it and didnt find anything visibly wrong.. But like I said it works when ever it wants. No certain speed or throttle position. I have indglo guages but I had this problem before I put them im so... any ideas..

 

Its more than likely the vehicle speed sensor, its located on the back of the tranny right above the differential housing.