Thanks for the update, guess your days of worrying about 42RLE temps are nearing the end.
Your report points to my cooler temps on highway being normal. I actually meant to mention my own transmission temperature report from Sunday. I repeated the same wheeling hill that I did a month ago. A month ago my temp sender was in the external remote oil filter right BEFORE the cooler. This hill is not the highgest heating hill as i was in 4-lo but last time i stopped 2/3 of the way up the climb when i hit 220°F on the gauge. This time i hit 140-150°F. So things are notablly lower when measured at the oil pan and the good part is i see the temp actually stabilize. When i measuring pre cooler it seemed to keep escalating once it got hot. I have lots more testing to do watch to see if I need to add an extra elec fan cooler. This weekend temps are set to be 89° two of the days so I should get opportunity to watch the gauge go up.