Mike Up

I'll be doing the same when these good year tires wear out, I'll be getting another set of LT tires. I won't be getting BFGoodrich T/A KO2s though. Those tires were terrible in the rain, offering little traction. I'll likely be looking at Bridgestone A/T Revo tires. Had those before and LOVED them for every road condition.

dlbb

look at the hankook dynapro also. they are the best tire i have ever had.

acdii

I can tell you guys on my setup it is NOT the tires. I have the same, I mean off the old truck same, tires that I had zero handling issues on the 14 with. When passing/being passed by a semi or other larger vehicle the truck handles predictably, so the system is setup correctly, the issue I am having is on uneven pavement, mainly concrete roads that have humps every 30 feet or so, or when it shifts from left to right. I hit these at anything over 60 and I get what feel s like sway, yet the steering wheel is rock solid, the rear of the truck is moving the trailer. I feel it in the seat of my pants, not in the steering like I would if the trailer was actually swaying, so I don't know what is causing it, but my 14 with the exact same setup right down to the tires did not do this. Im running Bridgestone Duellers on 20" wheels that have no flex to them.

If I move the wheel left and right, (or right to left for the heck of it) and try to sway the trailer it wiggles a little and locks in place. When I get the seat of the pants movement and look at the trailer it's wiggling a bit, but so is the back of the truck, not the front. Hard to explain what it's doing, but it's doing something the other truck did not with everything being the same. I should also note, it does it only on uneven pavement with no other forces, like wind, or passing vehicles acting upon it. Wind or passing vehicles move the entire rig as one like it should.

Haven't decided yet on what hitch to get, but when I do, I am hoping it takes care of the *** wiggling for no reason. A real head scratcher.

Moldman

I have been fighting the same issue with mine. My trailer is about 7500 lbs, hitch weight as been verifies at 940 lbs using a tongue scale.
My hitch is a Reese dual cam set up to bring the front back almost to the unloaded ride height.
I do have a theory what is causing the "loose" feeling, but it will be a couple weeks before I can address it.
Coming out of a 1500 Silverado as my prior tow vehicle, I can't compare it to an earlier F-150. But I ave spoken with several guys in the camp grounds and almost all have the same complaint.
So the engineer in me got to thinking about what is different with this generation F-150. And the biggest difference I see is how the factory hitch is constructed.
There is no bracing on the hitch going forward on the frame rails. I have looked under a '05 and a '14 f-150 to compare. Both these versions have the hitch load spread back the frame rails. So, i set up a dial indicator at the back of my receiver and then lowered the trailer onto the hitch with no WD bars. The hitch twisted almost 3/8" under the weight of trailer sitting still in then driveway.
My theory is that moving down the road the hitch is twisting, causing the WDH to load and unload as you roll over bumps and dips in the road. I have a buddy that owns a fab shop cutting out brace plates to run forward off the hitch to stiffen it up. It may not help, but seeing the hitch twist in the drive has my curiosity up.

mass-hole

Its funny you say this, because one of the changes on the 2018 F150 is a beefed up rear frame section, hitch, and axle. Part of it is that they increased the towing to 13200 lbs so I assume the tongue weigh also increased to 1320. I wonder if they also figured out there was an issue.

Siskiyou

So what are you using for your fixed point?

Moldman

My plan is to weld braces from about 2" on either side of the receiver tube, then run forward on an angle to clear the spare tire then tie into holes that are already in the rails. My hope s to stop the twisting of the hitch.
Like I said, this is an experiment on my end.

Siskiyou

Let us know how it works, I found my hitch had a lot of play when I slid it in so I made a spacer to tighten it up. I will be towing this afternoon so I may have my answer on this. It just doesn't make sense with the same trailer and hitch and the truck is rated to tow so much more than my last one and I have this sway issue.

acdii

You know, I didn't look under when dropping the trailer on, but what I did notice is that the 16 sinks more than the 14 did, and I did notice a lot more movement when lifting the entire rig with the jack stand to put the spring bars on. the frame also seems like it is made of thinner material than the 14 was. Next time I hitch up if I remember, I will put my dial indicator on as well and see for myself.


One more thing of note, at times it feels like the truck is sashaying, I can feel like the rear is dancing in a figure 8 and can see it from the windshield too. Since I got used to it, I don't know if it gets worse just before the trailer wiggles or not.

Simnut

That is really weird, isn't it? A shake in your booty....not good when you're talking a truck. Have you talked to the engineers that make Sumo Springs? PM me if you want...I have the gent's email address.