Originally Posted by D1g1tal V3n0m

My dad said since he doesn't know how they're set up in the rear end it could be a wheel bearing. My dad said that's what it sounds like. Jack it up and check and see if the wheel is loose and turn the wheel to see if you hear any noise. He said it could the driveshaft universal joint but doubts that. If it's the wheel bearing it will get worse when you around a curve and load weight onto it....

That's straight from my dad. I figured I would ask him for you.