hey guys and gals, my car has been in the garage for the past 5 weeks since three days after i bought it with a metal grinding sounds. turns out it was the transfer box. After being sent to a gearbox centre to be re-conditioned they decided they couldn't. So the garage have just informed me there going to get and brand new box from Audi and fit that. So my question is what's that gonna cost them? and i assumed the new box will come with a manufactures guarantee?