Enjoy your new truck as it should be wonderful to tow with. I also do anywhere from 55-75 mph depending on speed limits and traffic. One of my friends never does more that 55-60 no matter what and that works for him. Going south into Denver from Wyoming I was getting run over by 18 wheelers doing 80 plus. With that ten speed the engine can pick the sweet spot and stay at that rpm.
Happy and safe roads to you.
Tom Marty
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