Electrical problem
1994 Ford Aerostar 6 cyl Four Wheel Drive Automatic 142000 miles
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The speedometer is digital on my model. After a undetermined period of time driving the speedometer kicks off. sometimes it will flux to different speeds and the engine flux trying to rev at the listed speed and then it will go to zero. The car will drive but not shift into over-drive. There fore the engine will rev to high at higher speeds. Some times it will come back on most times not. Sometimes it will happen 1/2 after driving sometimes it will happen right off the go.