Knocking from rear?

[And]

I have started to get a knocking from the rear, it sounds like its from under the back? I have tryed moving the back box to see if it is that but it does not catch on anything? I have herd that the exhaust plactic clips some times go??? how you would know it was that?? pictures would help.

Many Thanks Andy

 

[justinhincks87]

Check your exhaust heat shield.... could be loose...check shock absorbers