I know we've covered this before, but I did a nut and bolt check this week prior to leaving for the MVPA convoy and found:
lower shock mount bolt front passenger side had backed out, allowing shock to wiggle around and contact shock tower.
tranny mount bolt loose, allowing tranny so "roll over" under load. (wondered what that clunking noise was)
oil pan bolts loose, etc.
So - check yer nuts!