Metallic clang when changing gear

If anyone knows of another thread which answers this then please point me in the right direction.... but I can't find one...

When changing gear in my 200tdi 90, but only if I have the window open, I can hear a metallic-sounding clank as I change gear. I can't hear any noise from inside so I can only assume it's something not inside the gearbox/transfer-box. The noise is not at all muffled-sounding so I'm assuming it's not inside one of the diffs.

I have checked all the UJs and as far as I can tell they are ok (but I'd welcome some advice there). There is some play in the propshaft (but not I think more than "normal") but I can't find anything else which seems loose at all.

Any ideas where else I could look ? The landy drives great but the noise is telling me there's something wrong.

Check your U-joints

Well, after a lot of trying to prise the UJs apart I've realised that they all seem ok but I've got play in the splined joint on the rear propshaft. New prop on order - just hope it's the right length....

Prop shaft now changed. No clanging any more. Also, I was getting some juddering when the engine was cold and that seems to have pretty much gone away too

Result !