Differential or wheel bearing???

Ok, I had a 25 minute drive home yesterday and I felt behind both rear wheel drum assemblies. They were both a little hot, but the driver's side was "burn your hand" hot. I'm going to put her up tonight and give the wheels a spin.

There is an old school trick if you have drum brakes in the back to determine a wheel bearing.
The sound changes when you put the brakes on because the drum brakes try to center the axle taking some of the load off the bearings.