I am after some much needed advice regarding a metallic tapping noise that I experience in 2nd and 3rd gear. I have replaced cats, I have checked the fuel pump and all ok. No loose parts on underside of vehicle, I have looked at hatch and all ok there. Sound comes from rear I think, but it is driving me nuts any advice on what the source could be would be welcomed. At present, I think loud music or ear plugs are the only solution :-)