Thread: What transmissions will fit?

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!

Originally Posted by 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.

Thanks for the info, that helps out a lot!