Did it throw any codes? OBD? And when you say it's stuck in nuetral, does the knob still turn? But nothing happens? And was it in 2WD when it put itself in N? Mine has done that before and it took me shutting it off and putting the lever in nuetral to get it to change range, but mine was stuck in 4LO after believe it or not, pulling logs out of a brush pile in the woods to make firewood. Maybe we own a couple of citified trucks? Or they're just lazy asses and don't like to work...