i have a 2007 chevy hd2500 4 door 4x4 new body style it has a truxxx leveling kit keys in front 1 inch blocks in rear i own a bighorn 33rl has anyone ever had one of the rear blocks crush and come out i did and the u bolts tore out and the left rear axle went all the way back to the bumper box side and bumper wrecked lucky it was only going about 30 mph rush hour going through houston with my bighorn this leveling kit says it does not change factory tow rating was it just bad luck or is there a problem