Well its hard to say david,
I think my odo was rolled back by a previous owner as car fax records showed higher mileage, so I would say that not at 85k like it says now, but rather probably 130 or so if carfax is right. But carfax info is not from DMV database according to DMV, so I don't know if it is accurate or not, but The car drives great so I don't mind even if it is not original miles.
But I don't suspect you will have a tranny failure at 85k....
Just get your tranny fluid and filter changed at regular intervals, maybe 15k maybe 25k, I am not sure what the interval would be, but you can be rest assured, I'll be doing my tranny fluid from now on, once every 15k maximum...
When I talked to my mechanic, and when he told me tranny was in need of rebuild as the clutches were disintegrated in the pan, I asked him what should I do. He said keep the car, fix the tranny, the car is beautiful.
So that tells me, he thinks all else is fine.