Well this weekend like any other in the summer I was on the beach . I didn't air down because me and my buddy wer maybe 100 yards from the entrance . So I put it and 4low and putted over there .. But when I went to pull up into the " soup sand" I head a loud BANG! And the truck jerked .. I stopped got out thinking I busted a u joint or somthing but ... Nothing .. Got back in pulled up ( still in 4low ) and everything worked .. I drove off and it seams every time I put stress I hear and feel this loud bang and clunk.. In 2wd it's fine .. As is 4hi.. Any one got a clue?