http://rvtechtips.blogspot.com/2011/...mperature.html
Do you know your transmission temperature? My Explorer, rated at about 7000 pounds, has a big auxiliary transmission cooler as part of the tow package. It seems to be thermostatically controlled at about 180 degrees when driving with no load. When pulling the TM on the flats on a cool day, it will stay there. But it doesn't take much in the way of hills to get it to 190-195 degrees. I have an alarm set at 200 degrees, and I NEVER let it exceed 220 degrees, even for a minute, even when climbing the steepest hills on the hottest days at the highest altitudes.
I went through a transmission repair once, and it was a ghastly experience. I hope never to do it again.
Bill