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06-09-2016, 03:25 PM
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#1
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Junior Member
Join Date: Jun 2016
Posts: 3
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Porpoising
Hi, we just purchased a 2014 Rockwood Ultra Lite 2904SS travel trailer and whilst it is well within the weight of our 1500 Chevy Silverado (with tow package) the trailer is porposing, according to the expert at the Hitch shop. We have a blue ox hitch on and wonder if this par for the course or if anyone has any advice or experience with this issue.
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06-09-2016, 03:40 PM
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#2
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Phat Phrog Stunt Team
Join Date: Aug 2011
Location: Iowa
Posts: 34,507
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Porposing
Install air bags on the truck.
Also if you have p rated tires remove those and go to LT tires.
2015 Columbus 320RS
2008 2500HD Duramax
2015 nights camped "34"
2016 nights camped "10"
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06-09-2016, 04:22 PM
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#3
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Senior Member
Join Date: May 2014
Location: Waterloo Region
Posts: 729
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It may be within the tow rating but you may be over on payload - that's what most 1500's run out of first. If you weigh the rig ready-to-camp and you're not over payload, then maybe tightening up the WD bars a link or two might help.
Does it happen on all roads or just in a specific area?
I had a <5,000lb GVWR TT I pulled with my GMC 2500 (waaayyy under all ratings) and it porpoised like to launch me out of the seat into the headliner - but only in one specific section of I-90 between I-190 and US-219 in Buffalo. I figured it had to be some weird resonance between the wheelbases and the way the concrete slabs were laid.
__________________
2015 Rockwood Signature UltraLite 8282WS Platinum, GY Marathon LRD, TST 507RV TPMS
2005 GMC 2500HD CCSB D/A, Curt E16, Prodigy P2, Garmin RV760LMT w/BC-20 b/u cam
Self restraint is for the young. I'm old and want it NOW!
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06-09-2016, 04:48 PM
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#4
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Junior Member
Join Date: Jun 2016
Posts: 3
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Thanks for the replies.
Hitch shop made some adjustments, however we will take it on a short trip this weekend to test, I guess that will determine how bad it is.
Hmm I hear you about the 1500 truck. In a few weeks we may have an opportunity to test the towing with a 2500 Cummins Diesel, which will put us at about 50% of its towing capacity.
Kind of disappointed as we love the floorplan and everything about the Trailer...
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06-09-2016, 08:34 PM
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#5
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Senior Member
Join Date: May 2016
Posts: 1,363
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Over the years I have found:
People greatly underestimate their tongue weight -and- people buy too little weight WD setups.
Make sure your WD setup is big/strong enough for your tongue weight. Ignore the "trailer weight" rating of the WD, follow the "tongue weight" rating of the WD. Next, don't be afraid to "crank it up". If your WD is strong enough to get your front end back down (or back level/equal squat... which is what I prefer, however some disagree), it should tow better.
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06-09-2016, 10:49 PM
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#6
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Senior Member
Join Date: Sep 2015
Posts: 3,464
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Your payload may not increase as much as you think.
That cummins weighs a lot.
2016 Sabre 36QBOK
2015 Ram 3500 CUMMINS
__________________
2017 Dynamax Isata 4
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06-10-2016, 09:21 AM
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#7
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Senior Member
Join Date: May 2016
Posts: 1,363
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Quote:
Originally Posted by Kenny kustom
Your payload may not increase as much as you think.
That cummins weighs a lot.
2016 Sabre 36QBOK
2015 Ram 3500 CUMMINS
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Everything else being equal, payload goes down with a diesel. The diesel weighs more and takes away from the payload.
Two identical trucks: one with a diesel and one with a gasser... the gasser has more payload.
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06-10-2016, 09:27 AM
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#8
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Senior Member
Join Date: Dec 2012
Posts: 644
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Turbs is correct. If you still have P rated tires on the 1500.
I had the same problem with my old F150. When I put LT tires on, it made a world of difference in towing and very little difference in non towing driving.
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Jay & Maria - Camp Dog Joplin
2018 Cedar Creek Champagne 38EL
Fulltimers since May 2018!
2017 Ford F350 Crewcab Dually Diesel
Officially homeless and loving it.
Ham Callsign K9NDY
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06-10-2016, 09:36 AM
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#9
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Senior Member
Join Date: Jan 2016
Location: x
Posts: 12,423
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X2 on lt tires, plus look at a better shock system in the rear that will dampen any movement.
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Retired Navy
Jake my sidekick (yellow Lab) 10/04 - 05/20
2017 RAM 2500 CC 4X4 Cummins Diesel
2016 Flagstaff 26 FKWS
AF&AM & El Korah Shrine of Idaho
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06-12-2016, 09:36 PM
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#10
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Junior Member
Join Date: Jun 2016
Posts: 3
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porposing
Thanks for the advice going to look into the tires. We are in Calgary and have to deal with snow driving in winter, currently have Nokian Rotiiva AT load range SL. Not sure what your "P" OR "LT" mean..
This weekend we towed the 29ft rockwood tavel trailer with Silverado 1500 with tow package, initially we could feel the porposing, did a quick google search and discovered that it is something that occurs when the rear end of the TT is heavier than the front which is the case for us (rear living model) so tightened the WD and the ride went a lot smoother.
Driving back today we experienced 40km crosswinds, the TT was swinging side to side and at one point almost felt like the tail was wagging the dog. We pulled over and loosened the WD and it felt more stable although still swinging.
So here we are still unsure, whether to change trucks to 2500Diesel or stick with the current 1500.
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06-12-2016, 10:45 PM
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#11
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Senior Member
Join Date: Sep 2015
Posts: 3,464
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Quote:
Originally Posted by 325BH
Everything else being equal, payload goes down with a diesel. The diesel weighs more and takes away from the payload.
Two identical trucks: one with a diesel and one with a gasser... the gasser has more payload.
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Yes, that is usually the case.
Although, I have found with this crowd, to answer more " liberal".
Use words like " usually, mostly, sometimes "
Saves a fight later!
2016 Sabre 36QBOK
2015 Ram 3500 CUMMINS
__________________
2017 Dynamax Isata 4
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