Re: revs upto 6.5k in 3rd - 4th wont select!
Just to fill you in I did have this problem before as well, it was fixed along with a service at a main dealer, which was back in Oct 2007. It said on receipt removal and refitting of gearbox, so I assume they used the longer route than the guide on Alfaworkshops website. They charged well over £400 labour for it.
So I am vaguely familiar with the problem from before, but last time I remember it was more intermittent (and combined with knackered clutch), this time it just seems 4th is impossible to select, fullstop. The clutch operation is ok, and it should be seeing as it was only replaced last July.
If from what I gather it is just the swarf issue again, then hopefully I wont need a new box. I'm just trying to guage whether or not a new gearbox is the best solution in conjunction with the permanent fix daveypark has mentioned, or if I can happily get away with fixing the current box. The car has done just under 64k miles.
To err is human, but you need an Alfa to really screw things up!
The road to heaven is paved with old Alfa's.