I'm having a similar problem, since getting BFG 265/75/16's. I cranked t-bars for about 3/4 inch of clearance, and have had a repeated clunk in the driver's side rear ever since - even without a load in the back (other than usual gear in toolchest and X-net, and Shrock sliders). I looked this past weekend and noticed the bump stop over that rear wheel is contacting the axle.
I was going to get Bilstein's to solve the problem - Brent, do you think the problem will be better solved with both AAL's and shocks? I suppose I will have to crank the front some more to level the truck out with the AAL's...
AAL's or shackles?
Thanks in advance.