What transmissions will fit?

[Six2stackmonster]

I have a '99 Grand Prix GT 3.8 w/o sc, 4T65E M15 A4. The o/d went out in it and I'm looking for a good used transmission to swap. What years will fit? Will all 4T65E M15's work, even from other GM vehicles?

Thanks in advance!

 

[99SactownGT]

I would like to know this too if anyone has input. Mine just recently had the O/D 4th gear go out and I am looking around.

 

[Bio248]

any transmission from any car that has a 3800 series II, but if you want it to plug and play without any tuning or other modifications then get another non-HD transmission with 3.29 gears.

 

[Six2stackmonster]

any transmission from any car that has a 3800 series II, but if you want it to plug and play without any tuning or other modifications then get another non-HD transmission with 3.29 gears.

Thanks for the info, that helps out a lot!