This truck came with an NV241 chaindrive transfer case (left) from the factory. It's plenty strong but only has a 2.72 low range and we wanted more. We haven't had a chance to test the new STAK 4x4 Monster Box (right) yet so we ordered one up. The STAK is a 150-pound brute of a case with dual low ranges and front or rear low-range capabilities, which should make for some interesting abusive testing of the front end when the time comes. Ours came with a driver-side front output and 1350 yokes front and rear.