Annoying Squeak

[HenDawg]

I am having trouble with a rear end squeak on my 2000 gt. I only have 18000 miles on it, but espeacially over uneven pavement and slower speeds I can here the squeak. I took it to the Ford dealer and he couldn't find anything wrong with the suspension. Basically he told me that is what happens when your cars tries to shift directions. Personally I didn't think he could pin point where it was coming from. My question is has anyone encountered such an experience and what has to be done to correct it? All I know is there is definetly something not right about it. Thanks in advance for any advice or suggestions.