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Old 08-05-2013, 08:51 AM   #1
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TT "walking" or swaying

When I reach highway speeds my TT starts to "walk" or sway.

My TT is a 2010 29' Evergreen Everlite with a dry weight of 4,935 Lbs.

MY TV is a 2010 Yukon with a 6.2L. Max tow capacity of 7,900 lbs with a WD hitch, built in trailer brakes and a WD hitch.

I'm fairly new at this so any information is appreciated.
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Old 08-05-2013, 09:12 AM   #2
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My guess is goings to be one of two things:

- weight distribution in your TT. Try moving weight around in the trailer. Perhaps load or unload some water from your fresh water tank. I trust you are using a weight distribution hitch? Use of these do not mean you can ignore proper weight distribution in both the TT and TV.

- alignment or wheel balancing on either the TT or TV (likely the TT if you don't notice any shimmy in the TV alone).
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Old 08-05-2013, 09:16 AM   #3
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tow vehicle inadequate (29 ft is a lot to tow with short WB vehicle)
tongue weight not correct
WD hitch setup improper

dry weights mean NOTHING....weigh the trailer as it will be loaded when it is going to be used...it is amazing how fast weights add up when adding, foot, water, gear, clothing, kitchen supplies etc
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Old 08-05-2013, 10:45 AM   #4
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Question is, you obviously have the Denali because of the 6.2L, but is it the regular or the XL edition? The regular has a 116" wheelbase and the XL has a 130" wheelbase. Makes a big difference because 29' is pushing it with the 116" wheelbase, but 130" might be alright.

I would suggest, making sure you load more of your cargo towards the front of the travel trailer. Being rear heavy can cause sway.

Also, look into a hensley arrow or propride hitch if you are going to be towing a TT that big at the max length TV(wheelbase) to TT ratio. With these hitches, the pivoting ball is locked in place, and the hitch pivots instead. The projected pivot point is closer to or at your rear axle instead of at the ball. Makes it handle more like a 5th wheel, or makes it seem like you have a longer tow vehicle.
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Old 08-05-2013, 10:55 AM   #5
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I may be off base on this, but do you have a WD hitch, but no anti-sway control? If you have WD and anti-sway, then it could be an issue of poor set-up/adjustment. If not, then a Hensley or similiar hitch may be the answer. I wouldn't be afraid to look for a good used Hensley as you can save a lot of $$ and any needed parts are easily available from Hensley.
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Old 08-05-2013, 12:55 PM   #6
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Need to measure the load at the ball - with the TT disconnected from the truck. Generally supposed to be about 10% of the weight of the TT.
Other factors already mentioned - poor weight distribution. Ideally all heavy items should be as close over the axles as possible and there should be minimum of heavy loads at the extreme rear of the TT. Balancing a heavy rear weight with a heavy front weight just makes things worse.
Tyre pressures in both vehicles, correct adjustment of the weight distribution hitch etc etc.

Until you get it sorted, you need to keep speeds way down. See a new thread today on a brand new TT and tow being totalled on the first trip.
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Old 08-05-2013, 01:17 PM   #7
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Dry weight, from the manufacturer can't really be trusted, as in the " Totaled " post, the sticker on the RV differed from the brochure. Careful weighing of the trailer and hitch and looking at the tire type and capacities compared to loaded axle weights is in order.
If the Yukon is on the original tires they may not have the sidewall strength required for a stable tow vehicle.
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Old 08-05-2013, 06:54 PM   #8
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With our 28' Rockwood TT, I have 2 friction sway controls because I have read it is recommended that TT's over 25' you should have 2. I haven't had any problems in high winds driving through Kansas and Oklahoma. Good luck with your problem.
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Old 08-05-2013, 07:59 PM   #9
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The 'Totaled" post is a prime example of not getting set up right and knowing the trailer weights and real tow ratings.

make sure you are not headed down the same path.

Ken
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Old 08-07-2013, 09:41 AM   #10
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Originally Posted by TXiceman View Post
The 'Totaled" post is a prime example of not getting set up right and knowing the trailer weights and real tow ratings.

make sure you are not headed down the same path.

Ken
Where is this totaled thread? I don't see it in the first 3 pages and a search found nothing.
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Old 08-07-2013, 09:47 AM   #11
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Totaled
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Old 08-07-2013, 09:50 AM   #12
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Originally Posted by Ramblin View Post
Much appreciated. Thanks... want to learn from any mistakes.
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Old 08-07-2013, 11:10 AM   #13
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Wow, just read the entire thread. Severe lack of education on towing. Good read for beginners for sure.
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Old 08-07-2013, 01:03 PM   #14
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Wow, just read the entire thread. Severe lack of education on towing. Good read for beginners for sure.

Some incidents are beyond the drivers control. One in Australia involved a write off of a caravan (what we call TTs) and car that had been used in that configuration forever by long-time owners. On this occasion they ascended a long steep grade and at the top accelerated to their usual speed and totalled the rig due to the out of control waggling we are talking about. No obvious reason found.
TT had two water tanks one in front of the axles and one behind. They were interconnected with a hose.
Can't be proven of course but one theory is that the tanks were both half full and during the long slow climb, all the water drained back into the rear tank and once the rig got back up to speed, the weight at the rear was enough to induce instability.

Some researchers say that the configuration of a TT rig means that regardless of the weight distribution and hitch weight, there is a speed at which total loss of control will occur. Granted, this might be 150MPH, but it will occur. In contrast, provided the hitch of a fiver is NOT behind the rear axle of the tow vehicle, the rig is inherently stable.
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