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What year/model is your truck?
Has this transfer case been in your truck all along and the 4x4 works?
Is it a rebuilt or new replacement that was ordered incorrectly for your application?
Do you have the knob to shift to 4x4,or a manual lever on the floor?



Thank you. I believe you are right and it does work. Now I am hosed on rear differential.There was only one transfer case option in a 2013 Ram Power Wagon which was the BW 44-47 manual shift version as listed above. I believe the only other option in a 2500 gas truck was the BW 44-46 which is just the electric shift version.
Quick search on RockAuto lists two part numbers for a 2013 Ram 2500 manual shift. One states "Does not have a electrical connection coming out of the rear case half" and the other states "has a electrical connection coming out of the rear case half". They are most likely identical otherwise with the exception of that, however I'm not sure right off hand what it does. Looks like maybe only 1 or 2 wires? Maybe an extra speed sensor or range position sensor? And maybe your truck simply didn't have that from the factory? It's not unusual for a manufacturer to revise or update a part for a later model vehicle, but it will still work on an older vehicle......for example, it is possible that a newer model year truck needed that signal or sensor for some reason but your 2013 did not. However it's a lot cheaper and easier to just make the one replacement transfer case with the electrical connector that can be used on the older or newer trucks, and just leave it unplugged on the older truck. Not saying 100% for sure that is what is happening, but could be the case.
Assuming you have personally verified 4wd works and the 4wd and low range indicators work on the truck?