Interesting thread. I transport TTs for the Mfgs with a 8 speed 3.92 14 1500 Ram ED. In fact the old girl just turned 500,000 miles. When you are towing a larger TT such as Livinfast & Laz are you really need to use a CAT type triple scale to know you are at least close as can be to Mfg spec for both maximum safety/stability and CYA legality.
I'm looking at my scale slip from towing a 33' floorplan 3 slide Forrest River Wildcat Maxx. Factory scale weight paper work that came on this trailer said 9,086 pounds dry. Dry the only weight distribution I had to work with was my WDH. (an Andersen) With the most weight transfer the hitch could give me it brought my tongue weight down to 11.3% or 1,026 pounds according to my scale results and the factory paperwork. It also replaced my steer weight to 3,300. So with these two more critical things being good plus the hitches built in sway feature, air bag suspension support, and load tires the trailer towed well. Tongue weight to factory original class 4 receiver rating for WDH was also in spec. GVW (gross vehicle weight) was high but still under combined axle rating. CVW (combined vehicle weight) was high at 15,800 but still below the 4th gen max of 15,950.
I transported it over 1,000 miles over 6 percent grades on I-5 over north Cal's Mt Shasta and up the grapevine into the LA area. Motor struggled on the climbs pulling down to 52 mph but rolled fine on the flats at 65. Even pulled off an average of almost 14 mpg thanks in part to the tune. The rig did not sway handled turned stopped well. No braking issues controlling downhill speed as the tuned truck has the turbo brake software and factory trailer brake controller so truck brakes always stayed cool and fresh for emergency stops.
Point being if I wasn't able to get this setup accomplished by working with the hitch and scale.. She likely would have been too heavy on the tongue making the truck unstable with higher COG. Light on the steer axle nose up she would be skittish and easy to roll in the event of sway from wind gusts semi truck bow wave or an emergency swerve around to avoid someone if they tried to pull out in front of me. With light steer weight she could take dramatically more distance to stop. The proverbial white knuckle ride. Same truck trailer hitch and weight mind you. Not something you want to do with your family in the truck or to other peoples families on the road.
Fortunately the Maxx had an excellent aero nose cone. With the flat box front high COG such as Livingfast's you will likely need/want 12% tongue weight to keep the trailer from wanting to wonder and cause sway, at least if you want to be able to run up to 65 to stay with right lane Interstate traffic for an out of state trip. Anyway hope this provides a better understanding and that someone benefits from it. Average camp ready weight from batteries propane water & supplies for most people is almost 1,000 pounds. From Livingfasts dry weight of 8,400 to a wet of 9,400 he would want to load it and set the WDH for a tongue weight of 12% or around 1,128 pounds. (scales read in 20lb increments) That leaves him about 400 pounds according to the sticker but go by the scale slip as its the legal and accurate. Exceeding the GVW a little bit isn't a biggie for stability or safety where as exceeding axle ratings can be. Just focus on getting the tongue weight and steer weight right for a safe stable tow setup.
