Sway problems

[Wscott52]

2015 F250 crew cab short bed 4x4 diesel -8650lbs (front 4900,back 3750)
35”x 12.50 x 18 (12 ply toyo)
2016 keystone impact toyhauler - 10,600lbs loaded, 1550 tongue weight

Curt WDH 17501 series with bars not chains

Level lot unhooked truck- front fender 42 1/2. Rear fender 43 1/2
Level lot hooked no wdh- front fender43 1/2. Rear fender 41 1/2
Level lot WDH front fender 42 1/2. Rear fender 42

Ball on unhooked truck is 26” to top of ball
Trailer top of hitch 24 1/2

Whew. I think i have given you all the details.
My problem is sway over 50 mph, i have read and researched all that i can. I have spent hours in a parking lot with no success. I am so frustrated right now i can scream. This is my 5th camper so I’m not new to this. I own and drive semi trucks so I’m not new to towing.
Comes a point where i need your expertise please.
Thank you in advance!!
Wscott

[Wscott52]

carringb wrote:
Have you measured actual tongue weight when loaded? I might simply be unloaded too much once you load the toys in the back.

Sorry i should have mentioned no toys. Just me snoring at night in the bunk.

I’m going to check the trailer suspension and tires. I saw that the trailer king tires are not very good? Maybe better tires?

[librty02]

Say it ain't so....it's a 3/4 ton it can't have sway issues...lol sorry had to just take a jab at the you can't tow anything unless it's a 1 ton dually crew that's on here....


In all seriousness like said above check your tongue weight loaded with your toys in the back. Take it to the cat scale. A lot of times these toy haulers are tongue heavy empty to compensate for adding weight in the back but some not enough or you just may have to arrange things differently inside. It sounds to me you are under the minimum 10% required tongue weight giving you that sway effect. Also have you messed with the WDH settings at all? A WDH set incorrectly can ruin anyone's towing experience.

[Wscott52]

camp-n-family wrote:
Your tires could be a problem. 35s on 18” rims is a lot of sidewall to flex. I’m going to guess that at 35” that the truck is lifted and they are AT or MT tires? Neither ideal for towing but shouldn’t necessarily cause sway. If they did it would likely feel loose at all speeds. I tow with a lifted 2500 truck with 35” Toyo ATs without problems.

I would suspect the issue to be more with the trailer. What are you hauling in the garage and how is it loaded? A vehicle? Is it loaded front end first or back? Are you loading the heaviest parts over or near the trailer axles?

They are AT but they are a 12 ply tire,not much flex. The truck has been leveled but not lifted. Fords have huge fender wells. I pull other trailers with out issues.
I think it’s the trailer as well. Feels like the tail is wagging the dog type of deal..

I do not haul toys. It’s just my wife and i, we like the open use of the back room as a 2nd room. That and she puts me back there at night because i snore. Lol

[carringb]

Have you measured actual tongue weight when loaded? I might simply be unloaded too much once you load the toys in the back.

[camp-n-family]

Your tires could be a problem. 35s on 18” rims is a lot of sidewall to flex. I’m going to guess that at 35” that the truck is lifted and they are AT or MT tires? Neither ideal for towing but shouldn’t necessarily cause sway. If they did it would likely feel loose at all speeds. I tow with a lifted 2500 truck with 35” Toyo ATs without problems.

I would suspect the issue to be more with the trailer. What are you hauling in the garage and how is it loaded? A vehicle? Is it loaded front end first or back? Are you loading the heaviest parts over or near the trailer axles?

[Wscott52]

Hmm didn’t think of checking suspension
I will check that tomorrow
Thanks

[Terryallan]

That is a puzzle. Tires on TT up, and tight? Truck tires to max?

all I can think of. your numbers look good. Have you checked the Tt suspension, and axles. No mounts broken?