Hello everyone! I am the proud owner of a 2001 Imola Yellow S4 Avant with a 6sp manual transmission. I'm having the proverbial third gear grinding noise that just started (car is at a little over 100K miles) and am looking for referrals on getting a transmission rebuild (current mechanic has isolated the issue, but does not do transmission rebuilds). I would love to hear of anyone that could help me out with this, with a preference for shops on the peninsula or in the south bay area.

Also, I am assuming that it would be cheaper to do a rebuild instead of simply purchasing an already rebuilt transmission and having it bolted in. If anyone has some guidance on this point, I'd be happy to hear it as well.

Thanks in advance!