BW 4406 Transfer Cases

The BW4406 transfer case is a part time chain driven case with an aluminum casing. It can either have manual or electronic shifting depending on the model. The 406 has larger parts and components than its previous incarnation, the 405, to be able to support heavier loads. The applications this case can be found in includes the F-Series from 1997-2003 and the Expedition from 1997-2002.