I just bought a used V70 that had the same exact problem. The dealership has had one whack at it saying it was a linkage but the noise still remains. Noted on clutching into first and when going over bumps it sounds like a little bird!!!! Definitely annoying. I will let you know as soon as I give them a second try. On a diifernet note, it also has this problem starting occasionally. It starts uop but fails hold an idle. It will always start finally and never dies once started. Basically a pain in the neck that I am afraid is going to get worse. Any ideas out there