take a look at the planetary. looks like 4 to me. my receipt says a 4l65e upgrade. hhhmmmmmmmmm!!!
http://img.photobucket.com/albums/v1...i/MVC-538S.jpg
http://img.photobucket.com/albums/v1...i/MVC-537S.jpg
http://img.photobucket.com/albums/v1...i/MVC-535S.jpg
http://img.photobucket.com/albums/v1...i/MVC-534S.jpg
http://img.photobucket.com/albums/v1...i/MVC-528S.jpg
http://img.photobucket.com/albums/v157/02denali/new.jpg
http://img.photobucket.com/albums/v1...i/MVC-526S.jpg

i think i need to look at my receipt and check it out.