Grinding sound from right rear wheel/axle?

Thought it was a wheel bearing seeing as how I have 106K miles..
Replaced both sides wheel bearings..

Sound is still there.. somewhat quieter but still there..

The sound, at low speeds, is similar to the ambient noise you have in a commercial jet.

Sound is drowned out at any speed over 20mph.

Any ideas what it could be if its not the wheel bearings? Only thing I can think it may be now is in the differential..

my bet is the carrier or pinion bearings...at least that's what mine was. my wheel bearings looked great when I replaced them but the carrier and pinion bearings were in bad shape.

thanks! Thats what I didnt want to confirm.. hahha
Looks like I will be debating this one for a few weeks...

I hate opening up the rear again! Ugh! (no prison jokes!)