I heard switching it over to manual is sorta a pain. Atleast from what I read. Your better off auto with some shifter kit. Usually the cost for rebuild is far more expensive then just buying a used tranny. I learned the hardway, the first tranny on the Mirage that went I had it rebuilt in 2002, and it cost me $1,365. After that one went I bought a used one from a salvage yard, only cost me $265 w/6 month warranty. Same amount of warranty I had on the rebuilt one and the used one lasted me longer.

I don't know how hard it is to find a used turbo auto tranny but good luck searching for one. In the meantime I would also call a few places to see how much it would be for them to rebuild it.