I put a new flange gasket on a while ago, was great for about 1 week, then gradually this rattle came into the exhaust at certain loads/revs.
So after looking over the whole system, shaking it and making sure nothing was loose or coming into contact with metal I came to the conclusion the rear muffler was stuffed, and this morning put a new one on. - which it was stuffed, but didn't fix the problem.
So the rattle persistsat certain loads, usually taking off slowly in first on slight hills etc. Not quite as bad, but still bad enough to be worrying.
Could the cat have shat itself? Would this cause a rattle like this? There was a fair bit of shit in the muffler when I took it off, and started the engine to blow anything in there out. - not sure if that indicates much because the baffles in the muffler were also well stuffed!