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Old 05-17-2018, 12:25 PM   #1
Jerkyguy
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Trailer sway

Has anyone experienced sway in their 40í Montana trailers ours is the 3402RL 2015 model. Iíve had some sway in it that I didnít in our old trailer that was 35í 15,500 gvwr Montana is 16,635 gvwr pulling with 2015 dodge 2500. I just installed air bags for easier ride donít know that will help sway though. Any thoughts?
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Old 05-17-2018, 12:36 PM   #2
richfaa
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We have the 13 3402 and before that the 06 3400.No sway at all solid as a rock. Our previous TT's did sway. There may be a issue with the truck
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Old 05-17-2018, 02:13 PM   #3
dieselguy
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Assuming your fresh water tank is in the rear ... fill it about half full and see if it gets worse or better. If it gets worse, drain it and put something heavy in the front storage compartment and check the results. Is your tire pressure correct? Is there a slight bow upward in both axles? Should be to have positive camber. Sighting down both tires ... they should be fairly inline with one another ... or get the trailer alignment professionally checked.
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Old 05-17-2018, 03:31 PM   #4
Jerkyguy
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Water tank is in center trailer,new 14 ply tires, axle?, will check!
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Old 05-17-2018, 04:03 PM   #5
dieselguy
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You still might experiment with loading of your fiver. How ever you do it ... add some weight to either end and take it for a drive. If it worsens, you'll know which end needs more weight. The reason I mentioned axles and alignment is I had a fiver that was toed out instead of in ... it wanted to follow all the crowns in the roads.
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Old 05-17-2018, 05:59 PM   #6
rohrmann
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Definitely need to make sure all tires are properly inflated, including the truck. Another thing to check is the ubolts on the trailer, that they are torqued properly, I think 50 to 70 ft lbs, while the weight of the trailer is on the axles. The center of the pin box pin should be directly over the rear axle or slightly forward of center. It would also be a good idea to make sure the front suspension on the truck is tight and aligned.
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Old 05-18-2018, 06:31 AM   #7
BiggarView
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All of the trailer recommmendations made so far are good, but remember you have a 16,600+ lb tail wagging a dog that weighs roughly half that. More weight (and possibly length depending on trailer axle and/or load placement) means you'll typically notice sway more for given tow vehicle. A dually will seriously help your situation whether you do the other things or not. (You should definitely check those things too.) There's a reason semi's have dual rear wheels and tandem rear wheels... and its not just for load carrying capacity. Towing stability is critical.

You mentioned adding airbags. Air bags do not mitigate sway issues, they only dampen acceleration shocks in the existing suspension by acting in concert with the existing springs and shocks. They also do not raise your axle ratings or tow ratings either. Whatever weight was on you axles before is still there plus the weight of the new airbag hardware.

JMHO
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Old 05-18-2018, 06:44 AM   #8
1retired06
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Significant sway with our tagalongs. We have experienced no sway with any of our fifthwheels, even with 80MPH 18 wheelers. I would be looking for something out of the norm either with the trailer or your tow vehicle, as described above. No sway is one of the plus factors in towing a fiver instead of a tagalong.
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Old 05-18-2018, 07:32 AM   #9
The Bone
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I would get the trailer aligned for sure. I opnly have a 13,000# trailer and my trailer is rock solid. Check the tires and see how they are wearing. That may tell you something
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