The first thing I would do is go around your bumper and make sure all of the connections to the frame are good, i.e. tighten all screws. I know that mine come loose pretty often, so I've got to keep going back in there to tighten them. I've been thinking about putting some plumbing-type lock tape on them to help them from coming loose so often. It would be interesting to see how many people who still have the stock bumper have this problem.

Mike
_________________________
'If a man speaks obscurely when he could speak more clearly, his words are to be interpreted against himself.' - Martin Luther