I have a 04 and towing in the winter, I had 5 passengers, a bed full of luggage and towing a 6 place snowmobile trailer, which is prob about 6500 or 7000 lbs. I was having a problem getting the TQ converter to lock in 5th, I downshifted it to 4th and it was happy as a clam. Even on flat areas it wouldnt lock, now this was at about 70 mph, at lower speeds it didnt lock either, but it wasnt as much of an issue. Doing this did cause teh tranny to heat up, but not to the H, but to the line below which based on my understanding is the upper limit of normal.
