I'm looking into making my baby 2004 Automatic 3.9L into a beast. I realize this is going to be a BIG project and since I'm in the marines it will also be a slow one. I want my end result to be a 5-speed, turbo charged sleeper that will make GTs **** themselves. My first step is a transmission. I've been looking at T-45s. I cant seem to find anywhere that says wether or not it will bolt up to my 3.9L or even fit in the car. Any knowledge is helpful..