Loud Humming coming from passenger side!, E-153 tranny- Carrier bearing? Options

[eggman40]

When im driving, i hear a loud humming sound coming from the engine bay. I could feel the vibration inside the car as the humming gets louder. It gets louder the faster i drive, so... My guess at first was the wheel bearing, but i lifted the car and wiggled the whee back and forth at 12 and 6 o clock, and there was no play. Sooo my next guess is the Carrier Bearing on the passenger side inner-axel? if a bearing is worn, would it make that humming noise? If it is, is it hard to replace? A little help would be nice, cause the sound is driving me nuts. Thanks guys!

[eggman40]

I replaced the axel today, and it did help the sound, but it is still there, just not as audible. Also, there is sound coming from the pass. side, it sounds as if a rock is bouncing around between the rotor and the dust plate for lack of a better description. It sounds as if a rock got caught in there and is just bouncing around. The boot on the axle was ripped anyway so at least the change was not in vain. But now im narrowing it down to the carrier bearing or the wheel bearing. Any Ideas? The carrier bearing was a little loose but nothing too drastic. How do i check for a worn wheel bearing? Thanks again for your help guys.