If the splines are all lined up it shouldn't be to hard. Just shimmy the tranny clockwise/counterclockwise until it slides into place I didn't have my transfercase on, so i just benched the tranny up into place and shimied it with my arms and pushed with my legs. Once it slid into place, i just put in a couple of the bolts and started to slowly torque them down going opposite sides back and forth until it was all tight. I had no problems. It was definately easier then the FWD cars i had done clutches on previous to the jeep, a lot more room to work haha.