About a month ago I started hearing and feeling this god awful sound on left turns, entirely at random.
I took 97 3500 to a mechanic down the road and he did some work on it, about 1800 worth, as follows (from the invoice):

Lower balljoints
Upper balljoints
Upper control arm bushings
Pitman arm
Steering knuckle/hub bearing assembly
Front wheel alignment

To make this short, I'm not a mechanic by trade but I am getting a little pissed off that this is some sort of big mystery.

To describe the sound, it sounds like someone is smashing my left wheel with a crowbar.

Thanks.
Clay