krusty,
Orignally they were doing some kind of adjustment that did not entail opening up the transmission. It never really fixed the problem. The next step was to replace the transmission with a new one as they did on my car. Now as DFWSB said above... they just repair the first gear syncros. I would just make sure they have everything on hand to do the job. They should easily be able to do it in one day. Clarify it before you take your car in.
I had a "transplant"... your just having a "by-pass". Good luck.