When we last visited the Phoenix's double-transfer-case buildup, All-Pro Off-Road's Mike Schoffstall had just completed building the "rear case" of a double-transfer-case system. "Rear case" is in quotation marks because as configured, and as pictured, it could function as a stand-alone single transfer case. In this instance, it is indeed the rear case of a double-transfer-case system. Advance Adapters' Trail Tamer 4.7:1 low-range set and heavy-duty low-range housing are already in place here. This time, we'll hit the highlights while the adapter and front case are installed. This will complete the dual-case transfer-case system.