I had a 2013 RAM 2500 Cummins and always pulled my trailer near sea level or through the WA mountains. We took a trip out from Seattle to MT, WY, SD, and ID. Headed across I-90 in MT, the temp gauge and the trans temp started to gradually climb to temps I had never seen and was getting pretty nervous. No warning lights or alerts...all temperatures seemed to be elevated but stable. I started asking around, and the temps I was seeing were perfectly normal for the truck. At higher elevations, the ambient air isn't going to cool as well as the thicker air in the low lands. So when we started climbing the Bighorn Mtns. in WY, at 10,000 feet doing 65mph on cruise control, the truck performed flawlessly.
Moral of the story - keep an eye on the temps, they may elevate and we get nervous, but they may still be in the normal operating range for the design of the vehicle. If they exceed the normal range, warnings will flash and tell us.
Hope you have an uneventful trip back.
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Dan S.
2015 Thor Chateau Super C 33SW
F-550 Chassis, 6.7L Powerstroke
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