AFAIK, my tranny's never been rebuilt. I'm at 246K miles right now, and it could probably use a flush.
I believe that I have all maintenance records between the car's original purchase and 190K miles, and I got the car at 223K miles. The tranny could have been rebuilt in that 30K mile gap, but I would venture to guess that it hasn't.
If the tranny dies and my hip can handle the clutch, I'd like to do a 4 speed conversion...