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  1. Hill shifting issues - 2014 3500

    Diesel Promaster Discussion
    I have 2014 PM 3500 with 140,000 miles on it. It is a diesel with the automatic manual transmission. Just got it a month ago, built it into a camper, and am currently on a 2 week trip in the PNW with it. Here is the problem. Anytime I am going down hill the van doesn't seem to want to shift...
  2. How to Down Shift Transmission?

    Engine and Technical Discussion
    I have a 2017 gas 3500. It's been converted to a camper and is near the GVWR. My question has to do with how to operate the transmission. I can't figure out how to get the transmission to operate in a lower gear when I need it to. When driving up steep hills sometimes the transmission remains in...
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