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Discussion Starter #1
Long Story....

Bought an 04 2500HD with the 6.0 to tow 5er in sig. All the numbers I researched should have matched the truck.

Truck was rated to tow 10,000lbs. Trailer maxed at 10,100 (no where close to that though)

Pin weight is 1300lbs, should not be a problem, dropped truck about an inch when I raised the jacks.

When I towed the trailer the rpms were through the roof and the combo would rock back and forth somthin terrible.

Wife got ticked and said we need a bigger truck (YES MAMM). Purchased truck in sig. Same trailer....Same problem minus the rpms.

Any suggestions other than a $2500 air hitch?
 

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Had similar issues with mine. Air Lift bags helped alot, but the bounce is still there. I think the only way to get rid of it is with an air hitch of some sort. Airborne, TrailAir, etc. At 35psi on the bags, I have taken away most of the bounce except for when going 75mph and hitting dips before bridges, etc. Hope this is what your wanting to know. Chris
 

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You are using a weight distributing hitch right? That and loading tongue heavy and using the air bags to stay level seem to be the best way to slow down the bounce.
Long Story....

Bought an 04 2500HD with the 6.0 to tow 5er in sig. All the numbers I researched should have matched the truck.

Truck was rated to tow 10,000lbs. Trailer maxed at 10,100 (no where close to that though)

Pin weight is 1300lbs, should not be a problem, dropped truck about an inch when I raised the jacks.

When I towed the trailer the rpms were through the roof and the combo would rock back and forth somthin terrible.

Wife got ticked and said we need a bigger truck (YES MAMM). Purchased truck in sig. Same trailer....Same problem minus the rpms.

Any suggestions other than a $2500 air hitch?
 

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Get the airbags....I had "porpoising" issues also....killed it in it's tracks:D
 

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I don't think airbags is the answer. But more weight on the kingpin is. I've had two 2500HDs and the current sig truck; pulled three different 5th wheels over the years. All three 5th wheels had kingpin weight that was minimum 2000 lbs. The trucks sat level with that weight and was stable except for the most violent dips in the road. My only other recommendation would be Bilstein shocks to help with dampening.

I have a set of airbags in the garage that I've never put on. Never felt I needed them.
 

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Like what others have said...........not enough PIN weight.
 

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not trying to steal the thread here, but I have a similiar question. The chucking that was described... what if the 5er had been a travel trailer?

I have the same issue with bucking. My hitch weight is just over 1000lbs and I'm using an equilizer distribution/sway set up. (properly setup)

I upgraded to bilsteins, but it has not helped the issue.

would air bags help solve this?
 

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Air bags on the truck or upgraded shocks may also work. :exactly::exactly:
 

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I was always under the impression that chucking was the back and forth motion not up & down or are they the same. I have this also on certain road conditions with 2500 lbs. pin weight, air bags, bilstein shocks. To help rid of this I think its still going to cost some and it won't eliminate all the chucking. I'm leaning towards maybe a new king pin.
 

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Airbags would probably help but what percentage of your total weight is the 1000 lbs? If it is too low you might have similar problems as the 5er





My trailer specs are as follows ....

840lb tongue
7500 trailer.

These are both dry figures from the book. I'm going to try and get it scaled this weekend to get my true numbers. I'm guessing with the battery,gas and my front storage ... I'm pushing 1000lbs if not a little heavier.


Thanks for the input ...keep it coming. I've been looking hard at adding bags, but will wait to see what the actual #'s are and I'll post them back here for feedback.


I appreciate the help!
 

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I'll throw in my $0.02 worth...

When I haul my camper fully loaded for camping, the ride is good. Yes I still have some rough ride, depending on road conditions, but it is well within the comfort spec. Boss lady doesn't complain about the ride, so that is good enough for me!

A couple of weeks ago, I had to bring my 5er to the dealer. We unloaded everything as the dealer is not responsible for anything stolen. The ride to the dealer was very rough, the 5er bucked the truck much worse.

So i agree, weigh down the pin on the camper, this will help with the ride.

Also remember, you are towing a camper and the truck will not ride like it does solo. You have 2 more axles hitting the same bumps and transmitting the bumps 2 more times to the truck.

Good luck and keep us informed.

Mark
 

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Discussion Starter #14
Thanks for the replys folks.

How do I increase the pin weight on my trailer? We pack clothes before we head out on a trip but that doesnt weight that much.

The bedroom consists of the bed, shower, toilet, sink, and closet.
 

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Make sure that the center weight is just slightly infront of the axle(s) of the trailer or 5th wheel.
 

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Look into 5th Airborne pin box. The best investment I have made for my RV. For about $700 it took out most of the chucking. My RV weighs almost 15,000#. I almost forget it's back there sometimes. My pin weight is about 2300#.
 

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poggy,

Check your fifth wheel hitch on your truck and trailer for tightness. If there is any play in your hitch or the trailer goosneck, your truck will bounce back and for violently. Even more so when slowing.

My trailer has a gooseneck ball. Me and my dad both had hide away gooseneck balls of different types. His was a fold down, mine was a pop up. They both developed excessive play with in a couple years causing your symptoms.

I am assuming you have a fifth wheel hitch that bolts in the bed. If you did not install it check it out for tightness. The installer may not have tightned properly.

Next, our trailers have an adjustable goosneck up and down. I would think yours should as well so you can level that trailer out. Ours have two large one inch bollts which tighten down on the sliding goosneck. If these are not extremely tight your going to get your bucking again. Also even if tight this is a week point so check it out for cracks or your safety chains and breakaway system well be getting a test.

good luck
 
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