[sandy]

I have an 06 GT and had the exact same problem. I took it to my ford dealer and after test driving it, the service guy said it was supposed to sound like that. I said no way, so they took an 07 off the lot and took me for a ride in it. Low and behold, it also had the cluncking noise on low speed bumps. The dealer checked their national hot line for complaints and had none on this problem. He said that eventually when complaints came in Ford might do something about it. OK, now listen to this. I wanted to lower my stang, so I added eibach prokit springs with tokico dspec struts. Vola', the noise went away and I haven't heard it since. This tells me the problem is in the factory strut/springs assembly and Ford doesn't want to deal with it.