Even on my F-350 the front tire PSI is supposed to be only 60. Too much PSI in the front might make the front a bit more jittery. I dunno, it's worth a try.

 

This is the one I test drove with very little WD applied

This is with the husky I had and the truck I purchased. Block under it due to all the adjustments I was making but is nit touching in the pic.

This is how it sits now. I've had the same issue with all 3 set ups.

 

If you have had the same negative results with two or three trucks I would be looking at the trailer. There is something going on there that is not right.

 

I second the vote for the Hensley! Had a Blue Ox that used to move me all over the place.....the Hensley definately does what they say it will! Best towing investment i made! They do recondition older units, heck, i can send mine back right now and get 500 bucks for it! My brother in law actually will buy it for the same price. It is 11 years old! I was on the phone with them thinking i needed another drop down bar for the new truck. All i have to do is pay shipping. these bars are 200 bucks alone and just the hitch bar itself (part that goes into truck receiver and hensley) is over 30 lbs! Anyway commercial over! LOL

 

Well the alignment was off some. Positive toe on both sides. I will hook back up and try it out later this evening.

 

Try turning off the truck sway control and just letting the hitch take care of the sway. My F150 3.6 Eco Boost with the Max tow package had problems with both truck sway control on and WDH hitch. The two worked against each other. Crosswinds and quartering tailwinds were worse. I find the same problem on my 2017 F250 6.7L Diesel but not as prevelent.

10,000# 30 foot trailer. Work and Play 25WAB. 1280# hitch weight

Jack

 

Ok, just spit balling here, but have you tried pulling the trailer without the WD?
As previously mentioned, a WD can "move" weight around (Ft &Re) significantly and since none of us know the engineering behind the sway control & adaptive steering a slight difference in the truck's attitude may induce some strange characteristics. Let's not forget plugging a trailer in "tells" the truck something is connected, and that might be a factor as well.
Lot of stuff going on with these trucks in the background.

 

Get your trailer weighed is the first thing, If you don't know its weight, loaded for travel. You'll never know what your tongue weight is supposed to be. To prevent sway the tongue weight should be now less than 10% the tt weight and 15% max. any thing les can induce sway pretty quickly with disastrous results. And a wd hitch wont stop sway if the trailer is loaded wrong, Unless its the hensly or pro-pride. Also get the tire pressures down to what it says on the door post a too high tire pressure will cause issues by reducing tire grip and make the sidewalls too stiff.

WATCH: Trailer swerves, overturns on Garden State Parkway

 

I tow a similar camper, 34' travel trailer. I don't have a '17 truck but I have a lot of miles logged with trailers.

1. Turn off all sway control, traction control, everything on the truck.
2. Use a plain old hitch, no WD or friction sway bar. Just a plain shank and ball.
3. Fill the water tank in the camper.

You should be perfectly stable and hassle free relaxed now. These trucks don't need WD hitches and in my years of experience they are the most stable tow vehicles of all manufacturers. If something is still wrong then there's a problem somewhere.

My first step to take would be to unplug the trailer from the truck and then drive. You could have some kind of ground problem and your trailer brakes could be working wrong. It might just be a faulty trailer brake controller.

 

My toy box has 3 axles I think it helps with the sway issue. With my 05, just traded in for the '17, I only had problems with sway one time. I ended up with Nitto grapplers, not by choice, I needed a set on a road trip and that's all they had, 35 x 12.5 x 20, these were horrible tires to tow with, like going down the road on ball bearings. I replaced them with Toyo's, much stiffer sidewall, and again no problem with sway even in 30 mph crosswind up in Owens valley. I have ran 4 sets of Toyo's and I swear by them. So the moral of my story is that tire selection can be a factor in trailer sway and I believe it comes down to the stiffness of the tire. I haven't had the new truck hooked up yet, hope the Michelins do good, they are pretty tall.

 

Sorry for the delay, but headed out on the trip last Thursday and internet was down when I got home Monday. I didn't have time to test after getting the alignment done. Luckily that was the problem. No more swerving around and it drove great. Campground I went to was about 240 miles away and I got 10.4mpg on the dash and 10.2 hand calculated at 70-75. Was actually getting 11.9 until i hit the hill country. Thanks guys for the reply's. I would have never guessed the alignment would be the cause given how it drove unloaded. With the truck I test drove doing the same thing you might want to have it checked when you take delivery. I hope this will help someone else in the future.

 

Oh and range on the tow is -0.08-+0.18. The left was at +38 right +28

 

RobRoy, It's good to know it was something simple and inexpensive.