yeah but think about when you turn your wheel what that birfield is doing, if it is broke then it could grind on the shattered pieces inside the knuckle it doesn't necessarily have to have them spinning inside the housing.  You should know if it's a trunion bearing when your driving it'll have slop in the steering and the wheel would have play in it.  maybe the bearings are dry that would cause some noise. just my    keep us posted though