Hey guys, I need some advice. I have a 2007 F150 FX4 Supercrew, automatic trans. loaded in what seems to be great/excellent condition. Very occassionaly, when as I am slowing down at inside-city driving speeds, I hear a sort of buzzing sound that ends in a clunk. What could this be or what is it likely?

Fortunately, I still have the dealership warranty as well as an extended plan I purchased with the vehicle. Hopefully, those will cover anything too ugly. Anyway, thanks for your help and your time.
Nick
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