Hello people, I'm new to this place. A Alfa boxer fan from the Netherlands so please don't mind the crappy English . I've been reading for a while, mostly the interesting topics but came across this one and i thought it was time to start posting

. I remembered having pictures of taking a 16v (33 series 3) gearbox apart so ill try to help a bit.
Correct me if I'm wrong, its been a while since I've opened one of those gearboxes
This is a gearbox, freshly opened and things being where they are supposed to be, just dirty and used.
http://img516.imageshack.us/my.php?image=alfakf7.jpg
You might want to take a look at the part,left of the spring, thats on the bottom shaft, the one where your gear lever is attached to. That pin is held within the shaft of gears 3 and 4, and moving it up or down is either gear 1 and 2 or 5 and reverse. Sometimes that pin is worn out or something is too lose, for example the right bolt on the gear 1 and 2 shaft. I hope its one of those things and not something that has broken.
If you have the room for it you can do this without removing your whole gearbox, just drain the oil, jack it up safely and check it. But if something is broken or you feel that is a pain to work above your head you can remove the gearbox. You can do this without removing the engine btw. Like somebody said earlier you can loosen up the center mount bolt, but you dont have to remove it. It has clearance so it can move up and down a bit.
Get rid of the exhaust first. After that just detach the drive-shafts from the gearbox(let them hang on the steering-rods for example) Remove the 2 bolts at the back of the gearbox behind the gear lever. Then loosen the center engine mount bolt so it slides down. You might want to detach the starter right away, iirc the bolts go trough the gearbox-housing. Then you can work on the nuts and bolts of the gearbox.
I hope its all correct since its been a while, but it might help you anyway.
Good luck!
Edit:
BTW if you want some more pictures of taking the whole box apart and renewing the synchro-rings just say it
