try to track down ss member JRL, he has without doubt the most information about this situation.
i would PM him, or, just butt in and ask him.
he may even find this thread.
ps; i would have changed it many times (about every 30k miles), so i have no clue of the reprecussions at this late date. i know a new trans costs about 2,500 to 3,500 bucks depending if 4 or 5 speed auto. probably i would want to do a bunch of other parts too, like mounts, axles etc.
best of luck! , we need a fingers crossed ditty here.