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Old 06-07-2013, 09:39 PM   #1
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What causes a bouncy ride

I'm pulling a 2011 23fb with a 2011 Toyota Sequoia. I use a basic WD hitch (forget the brand at the moment) with spring bars and my sequoia sits pretty level. This is my only towing experience so I can't compare to anything else. My only issue with this setup is on some sections of concrete paved interstate I get a lot of bounce in the back of the sequoia. It doesn't feel too bad in the front seat but if i look in my mirrors i see my kids are bouncing up and down what seems like a couple times a second. I have overloaded the bed of pickup before which caused some big or long bounces which leads me to believe that isn't the cause of this fast bounce. I've wondered if I need to add airbags in my suspension.......
Thanks in advance for any thoughts or experiences
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Old 06-07-2013, 09:56 PM   #2
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You are not alone. Basically, on some sections of concrete highway, the expansion joints are spaced in such a manner that it sets up a fugoid cycle due to the length of your rig and the way that the weight distribution bars work where the bouncing is self-reinforcing.

Sometimes slowing helps, sometimes speeding up helps but mostly it won't go away until you get off that section of road or the road surface changes.

The Anderson Hitch apparently addresses this problem very effectively but, judging by the raging battles about the Anderson on this Forum, there seem to be some "teething problems" in its present form.

Avoid I-10 between Lafayette, La and Baton Rouge...

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Old 06-07-2013, 09:58 PM   #3
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If it's the highway, it's called "porpoising" and it pretty much describes what's going on between your trailer & your tow vehicle! :-D
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Old 06-07-2013, 10:02 PM   #4
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Try to avoid I-20 through Bossier City and Shreveport.
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Old 06-08-2013, 06:10 AM   #5
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I usually back down those highways.

As far as air bag additions go, I doubt if they would do anything to stop the bounce, may even make it more like a jolt, and do nothing for weight transfer or payload.
They do go up and down though.

Bob
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Old 06-08-2013, 06:19 AM   #6
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Try to avoid I-20 through Bossier City and Shreveport.
Avoid Louisiana completely. Next time go by way of Omaha.
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Old 06-08-2013, 07:30 AM   #7
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An Air Safe hitch would help
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Old 06-08-2013, 07:34 AM   #8
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I-40 Westbound from Little Rock to the state line has to be the bounciest, roughest stretch of Interstate I've ever towed on. It was so bad, the toilet detached from its mount, and ended up by the front door.
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Old 06-08-2013, 08:00 AM   #9
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An Air Safe hitch would help
This ^^^ and try changing speed. The interstates seem to have a set distance between expansion joints, when they get worn it causes a frequency bounce. I drive a lot of I-95 with different vehicles and each one behaves differently on the same stretch of road. There is one stretch in SC where I can drive 70+ with my sedan, my dually I have to slow down to about 63 with my wife's truck and the Airstream in tow we get off on old 301.

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Old 06-08-2013, 08:41 AM   #10
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I would have to search the forum but I believe that I read the AirSafe hitches addresses this problems. Pricey hitches however.
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Old 06-08-2013, 09:11 AM   #11
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That is one of the reasons we went with the Airsafe hitch. If you are feeling it, your trailer is definitely feeling it. The condition is compounded by larger vehicles with heavy spring. We love ours and it has taken a lot of unpleasantness out of towing!
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Old 06-08-2013, 09:32 AM   #12
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In my opinion the Andersen WD system does an excelant job of controlling bounce on Louisiana's crappy highways. At least as much as any other system at much less cost. With my trailer/TV combination the differance with and without is night and day.
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Old 06-08-2013, 09:57 AM   #13
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I'll mention it, although it sounds like you already have it set up correctly - if your hitch is of the style that uses lifter bars (Reese, for example), and you don't have the lifter bars pulling enough weight, you'll get porpoising. I had one pretty bad situation with it, but adjusting the bars by reducing the number of chain links between the bar and the bracket cleaned it up.
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Old 06-08-2013, 12:56 PM   #14
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Make sure your shocks are up to the job. Sometimes changing to a different weight will help - the shocks that come with a SUV are not meant for heavy tow loads with weight distribution hitches. It will not eliminate the bounce but help to reduce it.
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