Hi, my car is making a very annoying rattle every time the n/s rear goes over a bump. It is a metal on metal type sound as apposed to a bang. i have had it up on the rapms given everything a good shake but cant recreate the noise when not on the road. had the arb link arm replaced, and new springs so pretty sure its neither of thoes. Does anyone have any ideas, its getting really annoying. Only really heard when the windows are down. Any help would be great.