"and didn't see my temps go over 1000 except on the one real hill... I have an exhause, the edge, and an EGT... oh and a 2003 HO 4x4 with a shell and a 48re"
Must be some small hills! I just towed from Seattle to Yellowstone and back (7500 ft elev. change, not including mtn passes). I consistently ran up to 1200, occasionally 1250 on level 2. I also noticed that while driving around in the park, that my EGTs took quite a while to cool down. Is this due to the high elevation? Next time I tow, I'll try it on level 3 to see how the EGT's do.
And sadly, I do have to report that a 6. 0 outpulled me up a long hill. I think his trailer weighed quite a bit less than my 5'er just based on its size, but he also blew smoke as he was taking off, so he must have been bombed too... ... .