Truck overheating towing on long steep grades.

That climb is probably the worst you can do. The speeds are low enough to don't get as much cooling as regular highway passes. Mine also hits 230F on that climb, but that's nothing to worry about for short durations.

What I did pull over for was my rear diff temp. I finally pulled over when the gauge maxed out. I good the diff once before, so I'm a little more careful now. But that's the only pull that gets that hot so soon.