I would defer to badger's expertise before I venture further.
Sounds like what mine did when the front hubs/bearings were bad, but mine is a 2003 and is regular 4WD.
Block, e-brake, jack up front end, hold tire at 12 and 6 o'clock, and wiggle hard.
Play from 12 to 6 is telltale sign of wheel bearing going/gone bad. At least on my truck.