knocking sound in my peugeot 306 xsi

[Haro]

Ive got a Peugeot for a bit of a run about and the thing goes really well. BUT there is this sound coming from the back of the car. It's like a knocking sound or actually more like a thud, in any case its driving me nuts. It only dose it once I've parked the car after a drive that lasts more than 20min. Not sure what it is could be maybe something to do with the exhaust but I really wouldn't have a clue. Has any one else had this issue?

[wazi]

rear axle bushes m8ty

[mart_haj86]

My dad has a 306, and has the same problem, the knocking on ours is actually the spare wheel bracket. But I dont think that would apply to the issue you have.