Roaring sound when breaking or steering.

I have a 2001 E350 van, and I recently changed the breaks. Afterwards, I hear a roaring sound when I apply the breaks or steer left/right.

Could this be a problem with the rotors? or something else?
Any input would be greatly appreciated!:banghead:

Is this roaring sound metal grinding? Sqealing? Rattling?

:sunglasse Thanks for the response. Figured it out today...wheel barings. Had me puzzled for a while.