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Old 10-09-2014, 06:45 AM   #15
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2012 25' Flying Cloud
Battle Lake , Minnesota
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Trouble is there are lots of roads like that. Andrew T. has good advice for us as best we can manage, light truck springs, soft Airstream tires, and a flexible hitch connection.

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Old 10-09-2014, 06:54 AM   #16
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Chelsea , Michigan
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I have an F-250 and, as a Michigan resident, consider myself to be somewhat of an expert on bad roads. In general my F-250 does not porpoise as you noted happening to you on I-69, but this has happened to me and usually goes away after a period of time or a change in road. However, I do about 95% of my towing outside of Michigan where the roads are comparatively wonderful.

I think you hit the nail on the head with your observation about the semi's doing the same thing on that particular stretch of road. I would see how things are for you on a variety of other roads before I started spending money on changing up the hitch.


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Old 10-09-2014, 05:32 PM   #17
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2004 16' International CCD
Chicagoland , Illinois
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I'm sorry, but I can't find where you told us what size bars you were using with your setup. I've often seen it written here that a 3/4 ton truck doesn't need much WD. Would 600 lb. bars be a better choice for this application?
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Old 10-10-2014, 11:41 AM   #18
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1986 34' Limited
1966 24' Tradewind
Conifer , Colorado
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I have the same bounce on bad roads with my rig. Some Super Duty fans report the FX4 rancharo shocks are way stiff. They say a Super Duty will ride better with Billstein 5200 shocks. If you are using off road shocks, consider changing them. I run 16" LT load E tires at 65 psi which stiffened the ride I'm sure.

But the highway bounce was about the same in my E-350 van and 50 psi trailer tires of years ago. And both tow vehicles ride decent on a good road. It just seems like some poured concrete gets wavy for some reason and the bouncing gets started. I should think there would be some way to pour the roadway flat.

I sure hope Airstream considers "earthquake" construction techniques. I'm sure the g-loads inside the trailer on a bouncy highway are really something. It sure can shake things apart.

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Old 10-10-2014, 01:06 PM   #19
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2007 28' International CCD
Springfield , Missouri
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I tow my 28ft International with a 2015 F350 and the only drawback was the pounding my trailer took while towing.Concrete roads seemed to be the worst.Installed a Airsafe Hitch and now the trailer just floats behind with no bucking transmitted back to the truck on rough roads.Wont travel without it after having one.It is hard to avoid rough roads when traveling.The Airsafe hitch will keep from beating up your Airstream and keep it from beating you up.You WD hitch attaches to the Airsafe.

The FX4 shocks are junk made in China and are almost non functioning when new.I removed mine at 500 miles on my 2012 F350 and my 100lb wife compressed it with one hand and it took 1.5 mins to rebound!I replaced with Bilstein 5100's and it changed the total ride to the passengers but did nothing to help the trailer.

Removing overload springs is not the way to go with modern progressive sprung trucks.
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Old 10-10-2014, 03:16 PM   #20
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Conifer , Colorado
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Thanks Moflash. I'm going to study these Airsafe hitch attachments.

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Old 10-11-2014, 09:25 AM   #21
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Southwest Michigan , Michigan
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Thank you to everyone that read and replied to my thread. It has given my lots to do and think about. Reading on this forum and having everyone's knowledge and experience is awesome. It will save me lots of trial and error plus money. Thanks again.

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Old 10-11-2014, 09:44 AM   #22
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2015 23' International
2013 25' FB International
Apache Junction , Arizona
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Sometimes the waves in the pavement create a oscillation frequency that can be modulated by changing your driving speed.

Years ago driving across Wyoming at the posted 80 mpg in a Suburban, we were getting beat up (no trailer). After I slowed to m70 mph, the ride softened and we floated down the road like a boat on small swells on a lake or the ocean.

On a really bad piece of road, I will slow down to a speed that makes the ride bearable for us in the truck and the trailer behind.
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TV - 2012 Dodge 2500 4x4 Cummins HO, automatic, Centramatics, Kelderman level ride airbag suspension, bed shell

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Old 10-11-2014, 10:00 AM   #23
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2014 31' Classic
Southwest Michigan , Michigan
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The bars I have are the ones that came with the Equalizer hitch. The hitch is rated for 10,000 lbs towing and 1,000 lbs carrying. I think that means I have 1,000 lb bars...

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Old 10-18-2014, 02:47 PM   #24
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1987 32' Excella
Nepean , Ontario
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My 2-cents . . .

I tow about 15-18000 miles a year through all kinds of roads. My setup is a 32-ft AS and a Dodge 2500 diesel TV. The hitch I'm using is a Reese dual cam. I had the hitch adjusted and set at JC - and benefited from a running commentary by the tech who was training a new tech. Some observations . . .

With the trailer unhitched - measure the distance from the road to the lip of the fender-well for both front and rear of the TV. Then hitch the trailer with the torsion bars and again measure the distance from the road to the lip of the fender-well. You want to have the same reduction in distance as between front and back, as this means that you've equalized the distribution of the tongue weight.

The sway control is adjusted . . .
Drive a short distance that is absolutely straight (the AS tech had me drive around their building and stop after going about 200 feet in a straight line). Then the cams were adjusted so that the torsion bar sat firm in the saddle of the cam bar - he used a pen-knife blade to ensure that there was no gap. The newer cam bars have a turnbuckle to adjust this length (mine required loosening the bolts where it is attached to the frame and tapping the assembly to move it forward or backward to effect the adjustment).

The dual cam system is an active sway control - it brings you back to a straight line, unlike the friction type.

I find that I don't feel any wind effects by passing trucks or buses.

There are some sections of interstate highways where the AS & TV act like a rocking horse - my response is to slow down to minimize the effect.
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Old 10-19-2014, 01:39 PM   #25
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2013 28' Flying Cloud
Hot Springs Village , Arkansas
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+1 For the Airsafe hitch. We get great results with ours pulling with a 2500 Duramax. Also have the Equalizer with the same bars.


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