The next day, we rolled out of Moab after an early start and full breakfast. About 72 miles later we found ourselves on the side of I-70 with a severe lack of power and horrible vibrations. It was a sunny day, but the wind was blowing at 40-60 mph and we could tell the weather was coming in. We had a long way to go and a short time to get there. When a brief look under the truck showed nothing, we tried to make a go of it again, but the vibration only got worse.