So I recently aquired a 1999 - 40' Holiday Rambler and Im currently using to tow my 32' race car trailer (10-11k lbs) to the track. Does great and I may be expecting to much out of the 78' ride but it has a little sway to her when trucks go by and worse around 65-70mph. I did recently replace all 10 rear suspension bushings, due to panhard bar bushing being gone. I also had an alignment just before the bushings. The hitch has load leveler bars but not with the sway control. Pervious tow vehicle Crew cab dually needed nothing for sway and was great. With the dually the trailer tounge was a little lower then with motorhome (level). I did try to put a little more tounge weight with the MH moving a 1000lbs golf cart up about 2 feet, and a 2500lbs car about 18" forward. It really didn't change the sway feeling. The chassis is an 8 airbag suspension.just looking for suggestion on what to make it better... thinkingshocks?installing aftermarket swaybars?adding a sway control to current hitch?if you have a suggestion, please include brands and why.thanks in advance.

My suggestion is to also replace the 10 bushings in the front suspension. Then weigh the rig with trailer and make sure you have enough weight on the front axle. I think the aftermarket sway bars would be a waste of money.

did you think of maybe towing the trailer empty and see how it goes? may be you just have a bad towing trailer.

At 78 feet you're illegal in all states, except south dakota. You're looking at some steep fines and towing fees. Might be just too long. You'll never remove all sway. It's just physics. But, start with rear track bar.

So many variables. Trailer axle alignment. I think sway bars help a lot. Tire pressure. Is the trailer perfectly level. I agree with increasing the tongue weight but is it 10% of the towed weight?

I hook the trailer to the dually same load .... Tows fine.... 0 sway. Same trailer, load, position inside trailer everything same with no problems. Only difference with the dually is the tongue is a little lower due to the ride height diff of the 2 vehicles. I can't lower the hitch any more on the MH to match the dually.

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Jamboree89
Explorer
Sep 21, 2015
My suggestion is to also replace the 10 bushings in the front suspension. Then weigh the rig with trailer and make sure you have enough weight on the front axle. I think the aftermarket sway bars would be a waste of money.
hanko
Explorer
Sep 21, 2015
did you think of maybe towing the trailer empty and see how it goes? may be you just have a bad towing trailer.
creeper
Explorer
Sep 22, 2015
At 78 feet you're illegal in all states, except south dakota. You're looking at some steep fines and towing fees. Might be just too long. You'll never remove all sway. It's just physics. But, start with rear track bar.
Big_Katuna
Explorer II
Sep 22, 2015
So many variables. Trailer axle alignment. I think sway bars help a lot. Tire pressure. Is the trailer perfectly level. I agree with increasing the tongue weight but is it 10% of the towed weight?
Slojoe72
Explorer
Sep 22, 2015
I hook the trailer to the dually same load .... Tows fine.... 0 sway. Same trailer, load, position inside trailer everything same with no problems. Only difference with the dually is the tongue is a little lower due to the ride height diff of the 2 vehicles. I can't lower the hitch any more on the MH to match the dually.
Slojoe72
Explorer
Sep 22, 2015
When using the dually the front of trailer is lower the the rear, with motorhome the trailer is perfectly level front to rear.
nevadanick
Explorer
Sep 22, 2015
What about air pressure in tires of mh ?
Slojoe72
Explorer
Sep 22, 2015
new tires... Tire shop had them at 110. I tried there, and let down to 100 with no real change
Executive45
Explorer III
Sep 22, 2015
Have you checked the hitch itself. It's only rated at 10,000#. Make sure it's sound with no cracks in any of the welds. Is it a bolt on or welded?..just thinking out loud..then again, maybe your just too long. With the size of the coach AND the trailer, that's a lot of solid side for the wind to push....Dennis
Slojoe72
Explorer
Sep 22, 2015
I went to a fab shop and had support braces welded to hitch to support.