Go Back   iRV2 Forums > MOTORHOME FORUMS > Toads and Motorhome Related Towing
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
Reply
 
Thread Tools Search this Thread Display Modes
 
Old 08-22-2016, 03:59 PM   #1
Junior Member
 
Join Date: Aug 2016
Posts: 8
Unhappy Major sway issues from towing trailer

I recently inherited a 35' DP from my parents and drove it three hours home with no issues. I replaced the tires and sway arm bushings. I loaded up my 16' car hauler with two ATVs and one SxS and took the family to an offroad park. The rig was extremely unstable and swaying badly. I tried moving the weight forward on the trailer (thinking it was a tail-wagging-the-dog situation) and that did not help. The trailer was high in the front so I leveled it with a 4" drop hitch. This too, did not help and it was all I could do to get the setup and family safely home going 45mph on back roads. I have towed this exact setup behind my older model Tundra with no issues except the one time I had the rides too far back on the trailer. The pickup does have after market airbags too keep it level due to the 600-700 lb tongue load. I am very familiar with towing but apparently clueless when it comes to dealing with a hitch on a MH that is mounted so far behind the rear axle. Am I applying too much tongue load? Do I need a WD hitch with sway control? Are the new Goodyear G661 HSA tires causing this? I attached a pic showing the final setup before the scary ride home. Any help is appreciated. Thanks
Attached Thumbnails
Click image for larger version

Name:	RV Trailer Combo.jpg
Views:	116
Size:	385.0 KB
ID:	136783  
__________________

__________________
aubtc is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free!

iRV2.com RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 08-22-2016, 04:05 PM   #2
Senior Member
 
Gordon Dewald's Avatar
 
Winnebago Owners Club
Join Date: Mar 2014
Posts: 9,176
I have no idea. From the picture it looks like a reasonable setup to my eye.

If I had to guess I would say that the weight on the hitch is making the front end of the coach a bit light.

You say 6 - 700 lbs hitch. What is the hitch rating? 5000/500?
__________________

__________________
Gordon and Janet
Tour 42QD/inTech Stacker
Gordon Dewald is online now   Reply With Quote
Old 08-22-2016, 04:44 PM   #3
YC1
Senior Member
 
YC1's Avatar


 
Holiday Rambler Owners Club
Join Date: Jun 2011
Posts: 5,140
Definitely need to know the hitch rating but one or two sway bars for sure will help. I can't advise on the weight distribution hitch without more info on the rv and mfgr information.
__________________
Myron & Deborah
08 HR Endeavor 40 SKQ
2012 Ford Edge Limited FWD 3.5L
Aluminator tow bar, Demco base plate
YC1 is offline   Reply With Quote
Old 08-22-2016, 07:02 PM   #4
Junior Member
 
Join Date: Aug 2016
Posts: 8
Hitch is rated 500/5000. Rv is 2003 National Tradewinds 7350 with cat engine on freightliner chassis. GVWR is 28,000 lbs with air ride suspension.
__________________
aubtc is offline   Reply With Quote
Old 08-22-2016, 08:37 PM   #5
Senior Member
 
BFlinn181's Avatar


 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 14,147


How much air pressure in the tires? If they are inflated to the maximum, it can effect handling. You should get the RV weighed, then look on the tire manufacturer's website for recommended PSI for the weight on the axles.

You might also try loading the trailer with less and see if that makes a difference.

Before you put new tires on, did the old ones show any wear patterns that could indicate an alignment issue?
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 08-22-2016, 10:16 PM   #6
Junior Member
 
Join Date: Aug 2016
Posts: 8
I really appreciate the responses. I am looking at getting the rig weighed and currently running 105 in the front and 100 in the rear per manufacturers sticker. The max tire rating is 110. I did notice that these pressures match the tire chart exactly for the max axle load that the rig is rated at for both the front and rear. So there is a good chance the tires are over inflated. The 10 year old Michelin tires showed no uneven wear with around 40,000 miles on them. When I first drove the rv with the original tires, all at 105 psi and no trailer attached, it drove really good at interstate speeds.
__________________
aubtc is offline   Reply With Quote
Old 08-23-2016, 08:38 AM   #7
Senior Member
 
Gordon Dewald's Avatar
 
Winnebago Owners Club
Join Date: Mar 2014
Posts: 9,176
I would certainly try weighing the coach and inflating the tires to the recommended pressures. I would also organize the trailer loading so the weight on the hitch is less than the 500 lb rating. Both are cheap solutions if they work.
__________________
Gordon and Janet
Tour 42QD/inTech Stacker
Gordon Dewald is online now   Reply With Quote
Old 08-23-2016, 09:52 AM   #8
Senior Member
 
Dennis_K's Avatar
 
Monaco Owners Club
Join Date: Jun 2007
Location: Lake Havasu City, AZ
Posts: 961
I would suggest investing in a tongue weight scale to make sure that is correct. I have a buddy who though he had his vehicle was positioned correctly for a 500 tongue weight and it "looked" okay but when the scale was used he had 1100lbs on it. I would also check for loose or broken parts. I have towed many thousands of miles with a similar diesel RV and never had any swaying, never used any type of anti-sway device either.
__________________
2012 Monaco Knight 36 PFT
2014 Jeep Grand Cherokee Overland
2005 Jeep Rubicon Unlimited on 2007 16' Car Hauler trailer
Dennis_K is offline   Reply With Quote
Old 08-23-2016, 03:42 PM   #9
Senior Member
 
Join Date: Dec 2013
Location: Lake Havasu City, AZ & Plover, WI
Posts: 1,190
If the air bags are inflated, it sure looks overloaded on the tongue. Too much weight on the hitch lightens the steer axle and compounds the problem with control. It's quite possible that the solution is in the tire psi and weight distribution. As mentioned, a cheap fix.
__________________
2013 43 QGP Allegro Bus
Crasher is offline   Reply With Quote
Old 08-24-2016, 02:20 PM   #10
Junior Member
 
Join Date: Aug 2016
Posts: 8
Thanks for all the help. I am weighing the rig tomorrow and recreating the trailer load this weekend to check the tongue weight and redistributing the weight on the trailer. A friend of mine is also suggesting that one of the air ride level sensors could be defective and causing it to ride too tall. I found a level sensor bracket on the rear that was bent and plier marks showing that it was done on purpose by a previous owner. The direction of the bend would make the rear ride about an inch higher. Going to contact Freightliner to get the exact ride height it should be set too.
__________________
aubtc is offline   Reply With Quote
Old 08-24-2016, 03:07 PM   #11
Senior Member
 
BFlinn181's Avatar


 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 14,147
Ride height is critical, especially in the rear. With the short distance between the transmission and differential, ride height will effect the angle of the drive shaft and U joints.

The fact that lever was bent instead of releasing clamps on the rod ends and shortening or lengthening the rod shows it wasn't professionally done.
__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Old 08-25-2016, 06:14 PM   #12
Moderator Emeritus
 
Gary RVRoamer's Avatar


 
Join Date: Jan 2000
Location: Silver Springs, FL. USA
Posts: 17,248
I'm very skeptical that a trailer that size could put enough weight on the hitch to lift the front end of a 35 ft coach appreciably. We are talking a 28,000 lb coach vs only 700 or so on the hitch. Nor do I believe that a weight-distributing hitch would help, though it certainly won't hurt.

Trailer sway is almost always a tongue weight issue - too little and the tail indeed wags the dog. Eyeballing it isn't very accurate, so scaled weights are need to figure out what is happening.

Other than "scary", it's not clear whether the coach was swaying around or the trailer was doing it. Was anybody behind you to see, or could you actually feel the coach moving around? Did the air suspension come up fully? Lack of air in the suspension can give some really scary handling.
__________________
Gary Brinck
Former owner of 2004 American Tradition
Home is in the Ocala Nat'l Forest near Ocala, FL
Gary RVRoamer is offline   Reply With Quote
Old 08-25-2016, 07:48 PM   #13
Junior Member
 
Join Date: Aug 2016
Posts: 5
Quote:
Originally Posted by aubtc View Post
I really appreciate the responses. I am looking at getting the rig weighed and currently running 105 in the front and 100 in the rear per manufacturers sticker. The max tire rating is 110. I did notice that these pressures match the tire chart exactly for the max axle load that the rig is rated at for both the front and rear. So there is a good chance the tires are over inflated. The 10 year old Michelin tires showed no uneven wear with around 40,000 miles on them. When I first drove the rv with the original tires, all at 105 psi and no trailer attached, it drove really good at interstate speeds.
Ten years old? I don't know that those are causing the issue, but they are undoubtedly an issue, regardless of how the tread looks.

Michelin is one of the few manufacturers that says it is safe to go over seven years, but even then, ten years is as long as you want to go with a tire.
__________________
jshupe is offline   Reply With Quote
Old 08-25-2016, 08:04 PM   #14
Senior Member
 
BFlinn181's Avatar


 
Gulf Streamers Club
Join Date: Jan 2012
Location: Cincinnati
Posts: 14,147
Quote:
Originally Posted by jshupe View Post
Ten years old? I don't know that those are causing the issue, but they are undoubtedly an issue, regardless of how the tread looks.

Michelin is one of the few manufacturers that says it is safe to go over seven years, but even then, ten years is as long as you want to go with a tire.
In the first post, OP said, " I replaced the tires and sway arm bushings." His response about the 10 year old Michelin tires was in response to my question about if the old tires showed any wear patterns.
__________________

__________________

Bob & Donna
'98 Gulf Stream Sun Voyager DP being pushed by a '00 Beetle TDI
BFlinn181 is online now   Reply With Quote
Reply

Tags
tow, towing



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Major sway problems crack.40 Trailer Towing and Tow Vehicles Discussion 53 07-23-2016 10:27 PM
2007 E450 30.5' Sway, Sway Sway... Donnie-Robin Class C Motorhome Discussions 17 03-03-2015 10:29 PM
sway sway sway 2014 Citation eestork iRV2.com General Discussion 5 04-09-2014 06:47 PM
1999 Monaco Dynasty Any major issues? SharonN Monaco Owner's Forum 2 06-07-2009 08:04 PM
Van towing issues-Sway-Unsteady smblack8 Trailer Towing and Tow Vehicles Discussion 10 08-19-2008 07:25 AM

» Virginia Campgrounds

Reviews provided by

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 07:25 PM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.