Yeah I have the 3.42 rear of course.
Weighed in at 27,000 lbs on a light packing weekend with the golf cart. GCWR is 29,000 lbs. OK there.
Drive axle was 3860 lbs. Pin weight was 3440 lbs. Combined it was 7300 lbs with everyone in. Rating is 9750 lbs. OK there.
Steering axle was 5460 lbs, 5640 lbs when loaded. Rated for 6000 lbs. OK there.
Load rating on the Firestone AT's LT285/60/R20's are 125R, so 7276 lbs combined. Technically that's 24 lbs over. So the wife can leave her purse in the camper next time. LOL.
The truck took it pretty well actually, but it was squatting about 2-3". So I put airbags in it to level it. It sits better now, but I honestly I prefer the feel empty oddly enough. Just seemed more planted to me. That wasn't the case with my 06 Megacab. I preferred 35lbs in it. It was running the Hankook tires though. I think those are 126R loaded rated. So they might have more side wall in them. The 06 was bombed, but the 4spd was a drag. It would wind out to get on a highway. This 14 takes it all in stride with the Aisin 6spd. I miss the power I had in the ol 5.9L. LOL. Put that ol 5.9L behind this Aisin and you'd have a frieght train.
Maybe a set of 19" wheels and tires eh? LOL.