Went to a local desert race this weekend and towed my pace american journey trailer (7x14) with full gear, food, water and moto with no problems. 3-1/2 hours each way and was able to do between 65-80 mph...i little vague sometimes shifting....i am a little leary at running at 4500 rpm (3rd gear) for any extended periods of time..but i did push it a little....seemed to do very well and in fact did better than I expected. I realize redline is in the 7000 rpm range (not in my truck to see what tach states), but that seems way high to me for a V8. I did not run overdrive at all and in fact kept in in 4th the whole time.....did not use tow mode because the manual says that is for heavy tow loads (i am at only about 3000 lbs max....see avatar). although the tow mode may have helped keep the tranny from up shifting back to 4th too early....i still have some experimenting to do but otherwise very pleased.