thanks fx4...I will try it now..i kept snooping and found a ford website (maybe not official) but it has the entire manual in pdf, so downloaded it, (free) and it says what you did.
new owner, 04 XLT 4x4, no owners manual....under what conditions does one switch from 2wd to 4wd low, or 4wd high? I mean, standing still, moving, under a certain speed, etc. never had 4wd vehicle before.... 3 position switch on dash.....