i've read a lot about switching to an automatic, and i'm going to get a th350. i've read that it's good to get a 2.5" body lift for more clearance. i can't find anyone who sells them. that's my first question. second is, what's the deal with splines? how many does the trans have to have to match up to the transfer case? and last, what kind of vehicle should the trans come out of? does it have to be a 4wd trans? i don't know how the transfer case and all that works.