I encountered same thing, same sound. New tires, pulled driveshaft checked center carrier bearing, mounts, & flex disks, No improvement.
Changed fluid in rear, Nothing. Ran with rear on stands, Nothing. Finally went to the dealer and had the rear wheel bearing changed.
Not saying you changed the wrong side, but that was it for me. Drove me nuts, I almost felt good about the dealer repair invoice.

Good Luck.

__________________
Gary
Experience is something you get, Just after you needed it....
'99 E300 295K, '83 300D 220K, '75 240D 185K sold
'80 MCI Bus Conv DD 6V92TA, w/4 cyl. Kubota diesel GenSet 12.5KW