I asked a similar question to this for engines earlier this week. http://www.grandprixforums.net/what-...1-a-75217.html
Same car, gonna look for newer 3800 at a pick-a-part and figured while I'm at it might try and get the combo. His car has around 220K on the clock and I'm worried if we get this new motor in the tranny wont be far behind. So, will a newer tranny fit or are the controls and stuff completely different?