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Old 01-23-2014, 09:25 PM   #1
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Rocking side to side

Is this common? I have the Ultrarac on the rear of my Four Winds Infinity 32r Class A but the coach sways from side to side at times. (rocks). Is there anything that can be done to stop this? Or is this something you just have to deal with? As you can guess we are new to the RV world. Except for a couple of small bumper pulls back in the 70's.
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Old 01-23-2014, 09:58 PM   #2
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I googled Ultrarac and did not get a hit.

How much weight it is putting on the rear of your MH? That could be a clue.
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Old 01-24-2014, 09:51 AM   #3
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I think that is the name of it. Anyway, it is to keep the motorhome from being pushed around when you are being passed by those big rigs. It cost (installed) around $750.00. Went on the rear axle. Seems to work fine for wind and big rigs but still getting the rocking side to side down certain roads.
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Old 01-24-2014, 10:03 AM   #4
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Sounds like other handling issues coming into play. Perhaps track bars and such.

I dont know what chassis you have. You will get more exposure if you post again in the appropriate chassis section, as in Ford, Freightliner, Roadmaster, etc.

Best wishes!
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Old 01-24-2014, 10:21 AM   #5
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Sure, you can handle by getting stronger springs and/or shocks, but you are probably just trying to compare the ride in a car with your top heavy (at least heaver) RV.

It is normal, and you probably will not even notice is after a time.

Ed
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Old 01-24-2014, 10:25 AM   #6
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What chassis do you have? It will help a lot to know that.
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Old 01-24-2014, 10:26 AM   #7
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Have you priced air bags?
Also the tire air pressure affects the wandering.
I found that the mfg put too much air pressure in the tires.
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Old 01-24-2014, 10:28 AM   #8
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I have the Ford chassis with the V-10
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Old 01-24-2014, 10:33 AM   #9
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Sounds like you installed a rear track bar. Good for big truck and wind push, countering the wag the dog tail effect, etc. But not effective in body roll.

For body roll If a Ford chassis investigate the CHF (cheap handling fix). This is a simple change to the existing sway bar connection that stiffens it a bit. Other things would be to ensure shocks and sway bar bushings are in good condition.

As mentioned, body roll and the feeling of it being excessive is part of the way a Motorhome drives and handles. You will not eliminate it. It's a big tall heavy box on top of the chassis.
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Old 01-24-2014, 10:34 AM   #10
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Cheap handling fix thread.

Cheap Handling Fix
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Old 01-24-2014, 11:12 AM   #11
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Also, it's likely very normal and something that most have just gotten completely used to. When we got ours, I noticed it on the drive home then got used to it. When my wife finally rode in the coach, it took a second for me to figure out what she was talking about with the rocking.

I think the cheap handling fix that was mentioned helps with that.
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Old 01-24-2014, 11:32 AM   #12
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X3 on the Cheap Handling Fix. It'll make a huge difference for a few minutes of work and no cost if you do it yourself. Easy peasy.
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Old 01-24-2014, 11:41 AM   #13
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Thanks guys, Really appreciate the help.
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Old 02-02-2014, 11:13 AM   #14
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Check out cheap handling fix in this forum. We had terrible rocking that went away after doing chf front and rear.
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