It's a slip yoke eliminator kit, basically just a beefier shaft for the transfer case and lessens the stress to the rear drive shaft. I have a 2' lift and are running 31/10.5 tires on it. I'm not sure what the gears are on it off the top of my head, but I try to keep the basic stuff stock so the parts are easier to get. I think that the gears are of the stock variety 3.14....sounds right.
Thanks to everyone for taking the time to help me out, other people perspectives and experiences are always insightful.