I am about to buy a 1986 Toyota Supra, and the engine was rebuilt at about 110,000 miles but it currently has 118,000 miles with original transmission and I don't know how long I can expect the transmission to last. It's a 4 speed automatic, "A340E" according to wikipedia, and I'd like to see if I could get another 60,000 - 90,000 miles out of it, or more, if possible. If this is something you know about, please give me a nice rough guesstimate of what I can expect, thanks!