Our LG Tromm DLE7177RM dryer is still fully functional, EXCEPT for a clunking sound. For a long time as you walked away from starting the dryer it just seemed like wet laundry, but after a little investigating it seems like the drum 'clunks' in the same spot every rotation. I ran it empty to discover that. It also seems like the drum is out of round, I can feel the inside of the drum at the felt seal and it seems to hang a bit lower, but I'm not sure. It spins fine, and other than the clunk, and it continues to work well. Would anyone have access to the repair manual so I could take a peek at the diagram, to see what possibly may be involved?