This is great to hear. I have a 34 foot Jayco trailer thats about 8k lbs. I've been pulling with a F-150. Lots of squat and I was beginning to overheat this weekend (it was 95 degrees).
I have a friend with a similar trailer and he's pulling with a 6.7 Tremor. He told me, "Dude, pulling with the tremor is effortless, like the trailer isn't even there!" Turns out last weekend as he was coming back from California he lost a tire on the trailer and didn't even realize it. a passing car flagged him down and everything was repaired. The 6.7 is that good?? kinda reminds me of that Clint Eastwood flick Every Which Way but Loose where grandma is dragging a car behind a tow truck and it basically grinds down to nothing.