Clanging sound makes tire deflat

[Old Doug]

My truck has had a noise that didnt worry me until i tryed to find it. I heared it and saw something lose on a step so today i removed a bolt and plate that was something not being used and i checked the tires one inside had the valve core backed out it leaked when i took the cap off. I backed it out of the shop clanging was still there. I could hear it was coming from the rear that filled my head with bad thoughts about something was wrong in the third member. I was about scared to drive it home but it was not making any thing happen to make me think something was wrong . At home i jacked one side up and put it in gear nothing i jacked the other side up clang clang how could something inside the brake drum be lose and not get hung up? I then figured something was rolling around inside the drop center of the dayton wheel i think its a weight off the brake drum. I think it made the valve core back out. Everything is good agin i will sleep good tonight.