On some trailers, you're not going to be able to use a WDH.
Case in point, I used my F150 to tow a Subaru Legacy and BMW 335i on a U-Haul car trailer.
Here are some of the numbers I was able to derive from my CAT weigh tickets:
But I did get it weighed at a CAT scale to figure out...
A flat bed trailer and an enclosed trailer can have the same exactly trailer axle weight and analytical tongue weight but behave significantly different with regard to sway due to their side profile. It would reduce the need for sway control (possibly a WDH) if the side profile of the trailer...
Also, different trailers will behave differently too. A 6000lbs enclosed trailer will handle differently than a 6000lbs flat bed car trailer because it would have a different side profile.
Just picked up my F150 this past week from Granger Ford and road tripped back to Maryland. It was an excellent experience. Would go with Granger Ford if we decided to upgrade to a Super Duty in the future or if we decide to go with the Mustang Dark Horse over the G87 M2.
... there's a quantitative way to measure this.
Measurements on a certified scale.... basically before and after. A WDH is going to be able to transfer far more weight to the front axle than airbags can every possibly transfer.
Bingo.
Air bags for the rear axle aren't really going to transfer much weight to the front axle. Not unless you're raising the rear of the truck substantially to the point where the rake looks silly.
It really only functions as a spring when there is a lateral transfer of weight - otherwise it has no effect.
Other modifications such as a leaf spring with a higher spring rate or airbags will also do this while cornering as well.
My preferred solution is retrofitting the HDPP leaf...
The limiting factor in these trucks like every other 1/2 ton truck is RAWR which is really a spring rate limitation. Even the 116-117 load index tires have enough capacity for a HDPP F150 since those have a RAWR of 4800lbs.
A rear anti-roll bar is probably the last modification I would make to improve handling in a bumper pull scenario.
It's more relevant in cases such as a 5th wheel/goose neck hitch where the hitch applies a force above the roll axis. Or in cases where you want to put a camper in the bed. The...
I would add that if you're looking at an HD pickup, get a 1 ton instead of a 3/4 ton unless you have some sort of GVWR restriction in your state that makes a 1 ton a lot more expensive to register.
Most 1 ton SRW have overload springs that should not engage unless the truck is loaded...
IMO, the best solution is an OEM solution such as the leaf springs from the Heavy Duty Payload Package. It may be the most involved install though. Theoretically (not legally), it should have 650-800lbs more Rear Axle Weight Rating capacity.