Driving diesel in very HOT temps - 103+ and long grades

I have a hard time believing it will be 105 degrees at the top of a mountain pass in the west. Looking at the record high of 101 even seems amazing. I bet at the top it will only be 80s or 90s and the pass info on Mr. Internet says it is only 2 miles of steep at the top around 7%. I drive the CO mountain passes, most of them, in the summer that are 7-9% for miles and miles and see no heat problems. My tranny is around 201F and my engine gets up to a whopping 205F. Not high enough to worry...

WW