Rigs
Newbie RV’er
Posts: 23
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Post by Rigs on May 18, 2015 13:30:13 GMT -5
Hello,
My setup:
I have an 03’ Silverado ½ ton extended cab Z71 towing a S320BHLKSS. With gear and everything, I am approaching, but not exceeding the stated towing capacity of my truck. Estimate about 750-500 lbs less than max capacity for truck. I have weight distribution bars that I actively use when towing. Once the TT is attached to the hitch, I lower the jack down again, pushing the rear end of the truck up. I attach the weight distribution bars, leaving 3 chain links dangling when the weight distribution bars are hooked up. Then, I raise the jack fully up. The hitch height is adjusted to have camper level when trailering.
My Issue:
While traveling down the road/highway (55-65MPH), when going over normal bumps in the road, the truck sometimes feels like it a boat in the water with a rolling wave like motion occurring. During travel on flat roads, no issues and a smooth ride. This only happens when bumps are incurred. The wave motion is less pronounced on the back end of the truck, however that motion travels through the truck and is more pronounced in the cab. After a wave or 2 it stops until road bumps are incurred again. Please note the TT pulls straight as an arrow. This wave like motion makes my wife car sick, so I am hoping to figure out a solution.
Questions:
Has anyone experienced that before?
Is my setup wrong or could it be done better?
Any suggestions on how to stop or minimize the wave like motion we feel in the cab?
Or, is the only way to fix this is to get a newer ¾ ton truck?
Thank you!
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Post by paroadking1 on May 18, 2015 14:28:41 GMT -5
Bouncing like that usually means too much tongue weight. Try moving some of your gear to the back, or going another link on the chains. You might have to adjust the height of the ball, after finding the correct tongue weight to level the trailer back out. The back of the truck should be 1-2" lower than normal ride height after hooking up.
Might want to also consider upgrading to anti-sway bars instead of just weight distribution???
A bouncy feeling is normally too much weight up front (too much tongue weight).
A swaying motion is usually when the load is too far back (not enough tongue weight)
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Post by joecamper on May 18, 2015 19:35:33 GMT -5
When I pulled with a 1/2 ton, mine did that many times. I toyed around with all kinds of "fixes", none of which totally eliminated what I called "porpoising". Thinking ahead to a 5th wheel, I bought a 3/4 ton. No more problems. There was still a bit of the pitching, but just about totally eliminated it. I would think that you could minimize the effect with anti-sway bars and experimenting with weight distribution. BTW, the 1/2 half ton was a 2000 GMC, and the truck (which I still have) I moved up to was a 2004 GMC with the Duramax diesel. I think the extra weight of the diesel helped a lot also.
Just my 2 cents.
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Rigs
Newbie RV’er
Posts: 23
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Post by Rigs on May 19, 2015 14:58:13 GMT -5
Thank you both! paroadking1 - Your info seems logical. I would say that my truck probably squats over 2" after attaching the trailer though. (Which goes to your point about excessive tongue weight). I will also re-check the level of the TT once hooked up too. Last summer, it was level with the WD bars on, but I will verify. This is what I use to hook up with, www.milford-auto.com/uploads/Product_Categories/images/wdhwithswaycontrol.png - hitch, WD bars, and anti-sway. (Different brand, but shows all the parts & pieces). Can you share a link of what you mean regarding "anti-sway bars instead of just weight distribution"? When I search Google for "trailer anti-sway bars", I get links depicting my current setup or automotive anti-sway bars. I did not see anything related to a trailer connection. I will also try to move more gear to rear, however we do that mostly now. Ironically, we upgraded our mattress this winter to a larger and of course heavier one - thus adding a little more weight to the front of the TT. joecamper - sounds like you had same situation. I was hoping here would be a more straight forward and easy fix for this. Unfortunately, I think this will be a challenge to resolve. To your point, investing in a 3/4 ton truck may be the way to go. I am not confident a 1/2 ton truck is beefy enough to pull the very large camper. Upgrading to a 3/4 ton truck may be necessary, however I'm just trying to avoid going to a 3/4 ton to minimize costs. Well, I guess I have some experiments to try: -Move more weight to the back of the TT -Verify the TT is level once fully hooked up for towing. -Re-review the posted tongue weight and tow capacities for my truck and validate against If there are other ideas, further suggestions are welcomed. Thank you!
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Post by paroadking1 on May 19, 2015 19:40:20 GMT -5
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mark
Newbie RV’er
Posts: 1
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Post by mark on May 19, 2015 19:45:41 GMT -5
I had the same issue with my avalanche and one thing that help I changed the angle of my ball. I forgot what way I went but helped a lot.
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Post by paroadking1 on May 19, 2015 20:10:22 GMT -5
The ball should be slightly angled back/down.
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Rigs
Newbie RV’er
Posts: 23
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Post by Rigs on May 20, 2015 10:08:47 GMT -5
Thank you everyone. paroadking1 - Thanks for showing me alternative setup up. I had not seen that before. Mark & paroadking1 - I had not considered the angle of ball. My setup does currently have a slight angle to the ball, however perhaps more is needed? Hmmm. I found this blog post: davidsrvtips.blogspot.com/2009/02/hitch-setup_2781.htmlI did not go to the extreme laid out in this posting with the measurements and all, but perhaps I should. It may be best to review the whole setup. I'll find some time to dig into this and report back in a few weeks. Thanks very much for the recommendations!
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