I have an 85 K10 with a 305 auto.
I started hearing a clanging sound coming from the right side of the vehicle a while back. Im not sure at all, but if i had to guess, i would say it seems like the front. It almost sounds like a chain rattiling. I notice it most, if not in its entirety while at slower speeds. This is probably just because I can't hear it while cruising.
Also, while parallel parking, there is something going on with one of the wheels, I notice this while cutting the wheel and trying to backup, there is a loud chirping/squealing and I feel what I would call wheel hop and makes it more difficult then it needs to be.
I hardly use 4wheel, but I put it in the other day to see hiw it is and the wheel hop and steering seem awful, but the 4wheel still seems to be functioning, and after I did this, it seems like the issues previously mentioned, got worse/louder. Not sure.