I have had a similar problem for 2+ years with my truck except my gauges act different from yours: when I'm idling the engine, every once in a while the speedometer needle will
jump to 10 mph and settle down and the chime will go off (truck sitting still), otherwise there is no check engine light and the gauges still works. I finally had to disconnect the driver side seat belt wire harness (the open circuit disables the seat belt chime). I have taken it to a dealer to hook up the diagostic machinie to it a long time ago and they could not find the problem, so since it still runs normal and starts every time I will drive it until it die and have to replace the gauge cluster, for I imagine that the part and labor for a new gauge cluster will be pretty expensive, and hope this is not a common problem as these trucks get up in age.
quincy443@yahoo.com
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2003 F250 XLT 4WD reg cab 6.0, 6-speed manual, 3.73 Limited Slip, Captains Chairs, Sonic Blue, FX4 Pkg, auto hubs, towing pkg, 8800 Lb pkg, Reverse Sensors.
