Hmmmm think words with previous owner would be in order!!!
To be fair he did join us at a meet in North Wales recently and returned home clearly with no concerns about the box. It didn't have any major clunk and was queiter than the last Rangie V8 I had which clunked merily for 40000 miles or so.
Luck of the draw I'm afraid but it doesn't really make me feel any better!
Lee D