I have a '95 LX with a 4.6. The speedometer, for some reason keeps doing a wierd fluctuating thing. It will be showing the speed fine, but all of the sudden it will jump about 20 miles over what I'm going, then fall back to what I'm actually doing. I know i'm not actually changing my speed because I can have cruise control on and it will do that, my rpms remain constant, and I can't hear any sort of shifting sounds or engine noises out of the ordinary. Anybody know anything about this that might help? Thanks!