as above is it changeable Ive got some play in it and you can hear a knock noise if you move it side to side, thinking this is the cause of my noise.
Thanks.

Ah ha! A man who sounds like he has a similar problem to me!

When the propshaft rotates i get a 'tinc' through every rotation - roughly. I have never been sure what it is, and where it comes from more to the point! Glad to know someone else out there has a similar thing, doesn't seem to effect anything just VERY annoying - is this the same for you?