Reese Dual Cam

Trailer looks to be about 33 feet.

start with changing the cheap st tires for lt the get more tongue weight on it

How much does the trailer weigh and how much weight do you have on the hitch. The Dual Cam is an excellent and well proven hitch that I used on two different trailers.

Other things to check are the tire pressures, are the weights on the trailer axles pretty much equal when towing level. What are the truck tire pressures and what rating tires are on the truck?

It sounds as though you have a trailer problem. The hitch and sway control will not cure sway, but should stop sway when induced for a short time.

What is the length of the trailer...30'? My opinion is that is too much trailer to successfully tow with a 1/2 ton truck.

Ken

Post some pictures here of your rig and your set up.
Maybe some of us who run a dual cam with great success can take a look and help out. Are you sure the 800 lbs bars are correctly matched to the GVWR of your trailer...just cause,"the dealer said," isn't always just so.

Also, some and I say some movement from the bow wave of a big rig is not unusual and should not be considered sway. Are you are the edge of loosing control or just feeling a little "sucking over" when trucks go past?

But, as previously mentioned, the problem might be elsewhere.

First thing I would do is slow down to 60 mph. I would not want to tow at 65 with your TV and that TT.

You should not need a fancy WDH to fix your problem. It sounds like something is not set up right. Which Reese WDH is it? Lot's of people tow a TT that length and weight with an F150 without issues without resorting to an expensive hitch. Depends on how your F150 is optioned for towing too.

It would help if you posted the weights you got from the scale. Photos would also help. Without seeing the numbers, I'd guess that your spring bars need to go up one size. If undersized, you can't transfer enough wt. back onto the steer axle.

Don't rely on the dealer to set the WDH correctly. If it's a dual cam, chances are high that the dealer has it wrong and maybe really wrong. Have you measured the before and after front fender heights? You need to look at the hitch manual to see what it says for what the restored front fender height should be and also what Ford says for your F150.

Is the trailer level when hooked up? It should be level or slightly nose down. Have you got the tires in the TT and truck inflated to the correct pressures?

How long/heavy is the TT?

I agree, there's something else going on.
Is the trailer sitting nose high?
Any unusual wear pattern in any of the trailers tires?

You have a problem that you shouldn't try to correct with a sway control device. You need to work out what is causing the sway and start from there.

Bruce