You got a code for the convertor slipping? Wow, I never even got that and mine's toast. Thats not to say that yours is any worse though.
Regarding your question about delaying the inevitable: My '87 Mercedes has around 280K miles on it and has never had tranny work done to it. Last month it started acting up and shifting hard, sometimes slipping. At the reccommendation of a tranny tech, I poured a tube of something called "Dr. Tranny" in and this instantly solved all the weird things going on. It was a small red tube and only like $4. I donno, it may be worth a try.
Whatever you do, do it before your fluid burns or it will be too late!
