LOL all I have is the basic street/strip 4T65E-HD from Dave. You can select what gears you want (2.93's, 3.29's, and 3.69's) and add things like a LSD, Bullet-Proof Input Shafts, etc. The basic one is fine, as the only thing you can't run on it is hardcore drag slicks since the input shafts aren't built.