GRRRRRRRRR i have a knocking sound from the back of my car, it only happens when i go to pull away, and it makes just one loud "knock" it doesnt do it when i go over any bumps or anything, looked under the car and cant see anything loose, i even gave the backbox a wobble and thats not loose could be the middle section?

My back drivers suspension is a bit creaky, but has been like that for ages as i bent some bracket, but i only bent it a little bit, just near the edge, but iam wondering if that mite be the cause

Maybe tomorrow i could see if i could take some photos of underneath the car.