I have the diesel trans installed in mine. I have not fire the engine up yet, maybe this week, hopefully. I felt safer trying the dsl. trans because I didn't know how the combo trans and diff. gearing was going to be. Hope I made a good call, can always swap it out. One other thing I think I noticed the gas trans. has some type of speed sensor on the engine flexplate that was wired into the trans harness? not sure though!