I drive a 2003 ZX5 5speed 2.0 Zetec with 177,000 miles. The speedometer is stuck at 37. The speedometer does return to 0 once the engine is shut off but returns to 37 as soon as you start the car. All the other gauges(tach, fuel, temp) work perfect including the odometer and trip meter. I've read other posts here that mention other things happening to car mainly with throttle issues or motor revs but mine works perfect other than the speed-o being stuck. The only other thing to mention would be once the car gets to 80+mph the hand gradually begins to slip back toward 0 but if I slow back to 75 the hand will climb back and remain at 37. I was thinking the speed sensor but somewhere I read about a coil pack. Any thoughts or previous experiences would be greatly appreciated.