36k gross combined WTF I would never have thought the truck could pull 30k. Thats double the rating. ImpressiveWater temp stayed below 200 and tranny around 150 scaling in at 36,000lbs for 140 miles. I haven't towed any farther but I think if it was to overheat it should have.
MikeL was rumored to be working on a bigger tranny cooler for the 06.I have overheated the tranny pretty good (250 degrees). I was out on the sand at the time (see my avatar). I am going to a bigger pan and will probably look at other cooling options to prevent it from happening again.