hi - for a while now, when my car goes over even average-size bumpers, at crawling-slow speeds sometimes, i'll hear a resounding THUD coming from the undercarriage of the car (its completely stock right now). we asked a mechanic at the dealer about it and he said everything under there was fine.
now that i'm actually going to mod it a little, one of my goals is get new springs and struts, which will lower it slightly.
my question is ... do any of you know what could be causing this sound ? i really don't think its ordinary, and im not sure lowering will help