I have a 2001 pontiac grand prix gtp supercharged with a 4t653-HD transmission.and i recently blew the transmission. And no matter how much i look i can not find a transmission. I have another grand prix with a 4t65e transmission will they be compatible
The non HD..4t65E was made for non supercharged engines and would not last long in supercharged conditions.
Can you not rebuild yours?
Google 4T65E-HD re manufactured transmissions, they are out there!