Thanks Ruedi, excellent info. I have heard that you can get away with changing the dog teeth that are on the gears along with the sliders and syncro rings. Since Alfa apparently never sold the dog teeth seperately they would have required that you buy the whole gear. In either case, it's probably not worth it.
Ray40: If all you need is a ribbed syncro ring to make your non-moly transmission work I have a couple NOS rings still in the bags. $50 each. I also have a couple of long rod transmissions with moly syncros that would work with your bellhousing and be a lot easier to rebuild. $125 each + shipping. A third option would be to modify your Duetto's bellhousing to accept a later short rod transmission ('74 and later). I have done this and can explain in a different thread if you like. I don't have a short rod tranny to sell but they show up frequently on ebay.
Last edited by Bill S; 07-11-2007 at 03:14 PM.
Reason: misspelled Rueeudi's name