Last weekend I was pulling a small trailer (less than 1500lbs) through central Texas in upper 90 F outside temps. My coolant temps reached as high as 224 F on slow rolling hills and would immediately come down to 212-217 F on flat highway. I was trying to maintain 65 MPH and the speed limit was 75 MPH. My temps in town without a trailer in normal driving conditions have been around 204 F. This engine does run hotter than my other Cummins equipped RAM truck and am worried that towing with it at those temps will cause damage to the engine. Like others have stated, the engine produces plenty of power and in fact power to spare... the weak link is the engine cooling. Would really ease my mind to know what the Jeep engineers consider safe and normal operating temps for different driving conditions. I purchased this diesel equipped Jeep specifically for its towing capabilities and am wondering if I made a bad decision.