Transmission swap question
 

Got a 2002 ssei needs transmission. I also have a 03 ssei which I understand is different from a 2002 transmission but if I switch transmission harness and pcm can I use a 03 in a 02?

It would be quite an adventure.

Before doing this I would suggest you have factory wiring diagrams and verify there before tackling this.

What's wrong with the 2002 transmission?

Is the 2003 transmission in that much better shape?