[Flojo]

did you do any checks by yourself so far on that issue?
sway bar connector loose or tired fix?
maybe you jack the rear up and try turning the wheel and also try to "rattel" it on its hub to see if there is a "loose" feel.
check loose pipes or anything that might move when turning.

but maybe its just a sometimes-tiny-rock-banging-around-inside the wheel hause? ...