Looking for the most complete system out of the box. Was thinking about the Full Traction 4" "Ultimate"Lift System. It states no drive line modes are needed. Is this possible if I run 37's? Will I need anything else if I run this system? I am open to all opinions.

 

I am buying the Rubicon Express 3.5 Super Flex Kit (which, gives you about 4" of lift) for my on order 2008 JK Unlimited X. My understanding is that you can run the stock shafts with this kit since the upper control arm is adjustable and the JK doesn't have slip yokes.

Of course, since I don't have either the kit or the jeep yet you may want to listen to someone else..