Here's my robustness story:
This last weekend I hit 408,000 miles on the odometer. On the way over the pass (Santiam Pass ~7% grade) I passed two 6.0 diesel pulling trailers, both quite a bit smaller than mine. They were doing the same speed as me until the steep part, but while they both bogged down I simply dropped into 2nd and blew past them.
On the way home, the temps were governing around 100F. Engine temp stayed at 198F and trans temp got up to about 215F. The rear diff was the hottest at 230F. Did the climb without missing a beat!
