Thumping noise from rear

[oldblu72]

I recently began noticing a thumping noise coming from the rear end of my 72 C10. It's only noticeable as I slowly pull into the driveway. The rear drums look fine but as I turn the wheel there is a slight squeak and then a thump sound like metal on metal. Would send a video if could figure out how to load it on here. I'm a newbie and will appreciate any information.