Just returned from a 1300 mile trip through the Colorado, Utah, and Wyoming Rocky Mountains. Uphill grades for 4 hours straight, downhill for 40 miles at 6 and 7 percent. I could do 70, 75, 80 mph, uphill on 6% grades for 20+ miles without slowing down. 40 miles of downhill at 6 and 7% in 3rd gear compression braking for nearly an hour. No problems detected. Engine is still running like a champ with no observed issues with any of the 10 inserts. Truck was lightly loaded, just some camping gear in the back and 4 adults and stuff in the cab. So far so good. We’ll see how it goes next summer pulling a trailer around the same path.
Jan 062014