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2022 3500 transfer case fluid

406DMK

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Hey everyone, I have a question regarding the correct transfer case fluid to use. Everything I can find on here seems to indicate using either BW44-46, or your favorite ATF+4. However, my manual says to use BW44-44 fluid. This seems to be the fluid used for the BW transfer case with 4WD auto and the BW44-46 is for the BW transfer case without 4WD auto. I just picked up a 2022 3500 CCLB 4x4 with the H.O. and AS69RC. New to the Cummins diesel, or newer diesel's in general (upgraded from a 2002 7.3 Powerstroke). This new truck does not have the 4WD auto option. With the tighter tolerances these new trucks have, I dont want to screw something up, and prefer to stay with what the manual says. But based on everything I can find, the manual appears to be wrong. Any help is appreciated. Thanks.
 

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