what trans?

YES it will bolt up to your 2.3T like it was made for the application. Now the question is will it work YES but not for long, some will say yes it will work and some have had it work but ask yourself this. Are you going to get on it?????? Are you wanting more control over the powerband???? Do you want to put in a AL4D just to destroy it and then go to the T5 like you should in the first place????? ( I already have asked all of these questions) The Merker had a C3 Auto that will work in the 2.3T It sits in my garage waiting for its buddy AL4D to come out and sit beside it.....