mazdatweaker
+1y
get the entire rear end off the ground, with the tires still installed.
With the vehicle indicating 25-30 mph, and someone near the rear end, you shold be able to hear localized noises.
From your description. . .it doesn't sound like a bearing as much as a driveshaft u joint.
Noises from under the vehicle are going to be heard on the driver's side while you are driving due to the waveform travel. If you were a passnger, it is likely the sounds might sound like they are coming from the right side.
Again, with the rear end off the ground, you can feel for driveshaft wobble with the engine off.
If you took off the tire and not the drum, maybe the wobble you saw was a loose drum on the hub.