But others, like Chris Overacker of Mountain Off Road Enterprises (M.O.R.E.), dream of what the Wrangler might be and ask "Why not?" The major stock-YJ complaint is that the suspension just doesn't flex. Some CJ fans also dislike the NP231 aluminum transfer case and low ground clearance. As you'll see, the clearance problem can certainly be fixed. And with companies such as 4-to-1 Manufacturing offering extra-low NP231 transfer-case gears, the aluminum boxes are gaining in popularity.