I brought a boat home today, 250 mile trip. 6-6500k lbs total weight being pulled. Shouldn't be an issue, right?
This truck struggled. I stayed out of tow/haul. Tried to maintain 60-65mph and not let the trans and engine get too hot. Good luck with that!
yes, it's 90+ here today but it's flat Florida and these 6.2's should not have this trouble. Gain some speed and let her lock the Tq conv and go. 60mph seemed nice but it would eventually fall off and unlock the tw conv. temp would eventually creep up and the trans would get near 240.
I'd turn the AC off and keep going at 60mph. Everything cooled down an repeat.
About 50 miles from home, I decided to try tow/haul. Usually tow/haul is for accelerating and holding shifts at the cost of mpg. I was holding the same rpm in 6th without tow/haul but the truck was getting hot, then I tried tow/haul, same rpm and gear as prior but the truck settled down, temp ran mid gauge like normal and the trans temp dropped to 201-203 at 65mph and maintained that fairly easily. My temp gauge usually stays right in the middle, today it was creeping about 1/2 to the next mark. No where near to hot but you can feel the truck lose power as the temp increases.
I'm starting to wonder what actual changes they have in tow/haul other than increased line pressure and shifts being held longer.