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Old 06-08-2015, 10:32 AM   #1
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Join Date: Nov 2014
Location: Texas
Posts: 11
Jarring While Pulling Brickyard

Got the 2015 Brickyard and towing with a F350 dually, Firestone Air Bags installed and inflated to 25-30 psi while towing. The pin box is a Lippert Rota-Flex. When driving on our wonderful Hwy systems he in the US, the uneven pavement and potholes cause a jarring of the vehicle and coach at the rear axle. It will make your teeth hurt. Also running 75 psi in tires on both truck and coach.
Anyone have the same problem and concern for the long turn problems that will arise from this condition?
What about changing pin boxes, Flex-Air by Lippert?
Thanks for any help.
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Old 06-08-2015, 07:37 PM   #2
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Location: WI.
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Have you checked to see how much pin weight you have?
You might not have enough weight up front if you are loaded heavy in back with your toy hauler.
If you haven't had it on the scales, it might be worth the effort.
2008 Cruiser CF26RK
2013 Ford Eco-Boost
Heavy duty payload - Max tow
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Old 06-08-2015, 11:49 PM   #3
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Location: Saskatchewan
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X2 on what Lloyd said, may need more weight on the pin. Also try upping the air pressure in your air bags to 45 psi. That smoothed mine out a fair bit but I also have a fairly high pin weight on mine. Shouldn't need to change the pin box.
2013 CrossRoads Cruiser Patriot CF345RF
2011 Ford F350 Lariat FX4 CC 6.7L Turbo Diesel (Heavily Modified)
Saskatoon, SK
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Old 06-09-2015, 07:21 AM   #4
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Just going by the weight on the RV spec sheet shows 3290 lbs. I have pulled the coach empty and with 110 gals of fresh water. Pretty much empty in the rear on all occasions. It doesn't seem to matter with the water or not. The ride is the same. I will try more air. The generator exhaust support was torn loose and I can only attribute that to the massive hard jolt at the rear axle. Thanks.
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