Ok, I just saw the recent thread about rear brakes and it would appear that the issue discussed there is not an isolated issue. I completely replaced most of the parts on the rear brakes a few months ago including wheel cylinders and drums. Pretty soon afterward, my rear end started making a clunking sound (at least this is what it sounded like to me, but I could be wrong.) I dont feel any extra drag on the truck like there would be if the brakes were locked up but I was wondering if they were touching just enough that they were making this out of round motion. Funny thing is, the problem doesnt seem to be as loud anymore and there were no fine pieces of metal in the fluid when I changed it.