Transfer case
 

Does anyone know if the BW 4484 transfer case is the only model that works with the hummer? Would 4485 work, or NP246. Is bw 4484 specific for this vehicle? If so where can I find a cheap one , new or refurbished?

It is Hummer Specific model and easier and cheaper to find the rebuild parts needed than a refurbished unit locally to anyone in most cases.

So the 4484 is the only model that will work in a hundred. Not 4482 ? 4485 ?

maybe more than a hundred, like all that came with them installed.

BorgWarner 4484 transfer case (Figure 1) provides the full-time 4WD that powers the Hummer. It’s larger than its sister unit the BW 4482, but the designs are much the same. These transfer cases are two-speed units providing full-time 4WD.