stock suspension/wheels? anything rubbing? hit any curbs? wheel bearings okay?(although if its grinding, sounds like its gone)

 

I just recently had that prob, sounded like it was coming from the drivers front, my father in law and I checked it out and found it was actually the u-joints and center bearing of the driveshaft, we replaced both for about 75 bucks and that fixed the problem, so maybe check that out

 

I would consider the engine mounts too.

How did you diagnose the U-joints. Did you place your hand on the drive shaft to determine if excessive play occurred in the bearing by trying to rotate the shaft?