F150 ecoboost towing

CantCampEnuf wrote:
Just got back from our first trip with new truck/trailer combo. I am impressed. The truck was very comfortable to drive, got good gas mileage, felt comfortable towing, had little sway, and had power to spare ascending 6% grades.

Questions: I always have driven my Fords in tow/haul, then downshifted when descending grades over 5%. I have not downshifted ascending at all. ON one climb coming out of Camp Verde...We got a message on dash display saying engine was running hot and would downshift to lower gear. It did and engine temp dropped dramatically. I don't know if that was normal, or because we were climbing 6% in tow/haul, but forced to ascend slower than we wanted due to traffic. Note: truck had sat idle run after filling up with gas/getting food for kids for 20 minutes right before climb started and we are in AZ, it was 98 degrees. Thoughts?

Also, there is drive, M, 1 and 2. Along with tow haul. Let me know what you cruise at. We are pulling 9k, 32 ft.

My trailer is 35ft, 8k dry. Towed it through New Mexico and Colorado last year with no issues. I usually lock mine into 4th or 5th depending on the terrain and run at 65-70mph. On a few climbs I've had to drop it to 3rd to maintain 55mph. Never had any overheating probalems. You might try swapping thermostats or running a higher distilled water ratio in your radiator. JM $.02