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Old 07-21-2014, 04:44 AM   #1
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Is chucking dangerous

Probably the biggest issue we had on our virgin pull from Tampa to Nashville was the violent chucking while underway at highway speed when going over the connectors on and off bridges and over other road bumps. People and things tossed about in the TV, very scary at first, and uncomfortable once we figured out it was going to happen.

A couple things concerns me.

First, the Trail Air hitch I have on the RW says 18k GVWR. Not the 38FL delivered came in just over 16k. Adding much stuff will easily put it very close (if not over) that 18k limit. What will that hitch pin actual with stand? That seems to be very close to limits....

Next is the hitch connector on the truck. There has got to be a huge amount of force while the RW is bucking back and forth. Concerned about damage and the worst case scenario dropping the camper on the highway when this happens.

In a different thread on this forum it is clear that I need to get air bags installed on my F350 DRW TV. I want to do that but am planning to leave end of this week or worst case Monday next week to head north. I don't think I'll have time to make that happen before I need to head out.

I need to pull a total of 1,400 miles from home -> Oshkosh, WI for an airplane show -> Indiana for the rally -> back home. I can convince myself, and perhaps my DW, that the with out air bags we can do the trip provided the violent chucking is neither dangerous or has potential of damaging the RW or the TV.

Any thoughts appreciated.

Thanks,
Ken
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Old 07-21-2014, 05:07 AM   #2
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The air lift bags will fix most of this. The chucking is only dangerous to your back or neck. It also seems to lite up the wives
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Old 07-21-2014, 05:12 AM   #3
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So if I understand correctly my choice is either install air bags in the TV or a wife dimmer switch I'll go with the air bags.....

The on/off and volume switches I added a while back to my wife-gps has never worked as advertised so I doubt the wife-dimmer will as well.

Thanks!
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Old 07-21-2014, 05:41 AM   #4
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Chucking

ksaltman

I've had the experience you are describing. Each state has different road conditions. Mississippi and Louisiana can give you a wild ride. When I see a bridge I take my foot off the fuel pedal and let it coast, this calms the ride significantly. I don't use cruise on bad highways.

Joel and Janis
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Old 07-21-2014, 05:48 AM   #5
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In all seriousness Joel and Janis, thanks for the response. Have you installed air bags? If so do which ones? If not is it enough to manage the issue by driver awareness/response?

On long pulls I'd really like to use cruise but also understand my definition of a "long pull" is changing as I get more and more into this.....
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Old 07-21-2014, 06:30 AM   #6
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In addition to air bags, make sure you're hitch puts the pin just forward of the rear axle. I found when I weighed my setup that my front axle lost about 50 pounds with the trailer connected. This means the rear suspension is taking the brundt of the chucking. I reconfigured the hitch a bit to move the pin weight just forward of the rear axle and it seemed to help. The thinking is that now the front suspension can help more with the violent chucking.

I did a pretty good search on the Internet before I realized this. Apparently this is the first thing to look at when you have chucking.
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Old 07-21-2014, 07:20 AM   #7
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Ken, do you have the triglide pin box with the airbag?
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Old 07-21-2014, 11:57 AM   #8
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We have the same setup, 38FL with the Tri Glide Pin Box with Air Bag.
Our first pull from Tampa FL to Tallahassee FL was pretty rough.
Been playing with the air pressure in the Air Bag, yesterdays trip down was much better.
The RW was hitched a little high, I lowered the hitch last week one position.
Adjusted the pressure in the Hitch Air Bag to 60 Psi, much better trip yesterday from Tallahassee FL to Ft Myers FL (Yep right back down I-75 past Tampa FL to Ft Myers)
There are some pretty bad sections of road under construction around the Tampa area.

Still had a few hard hits which I believe is a combination of the Hitch Air Bag unloading the Trucks overload springs causing a pretty hard bounce.
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Old 07-21-2014, 12:49 PM   #9
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I'm not sure if you are referring to the front-back movement generally caused by those concrete expansion strips on the interstates or the up and down movement that I call porpoising that occurs when going over bridge expansion strips or sudden road undulations.

I found our Fords (both our old SRW and our 450 Dually) tended to porpoise a lot, I recently installed a set of Timbrens (which replace the standard bump stops above the rear axle) and found a dramatic reduction in porpoising at the cost of a slightly stiffer ride when hauling the RW. Our RW doesn't have the air lift pin, just the standard unit.

Air bags on the truck would probably do the same thing, I chose Timbrens as there is no air pressure adjustment required when the truck is unloaded, the Timbrens sit just above the axle and don't interfere with the ride unloaded (and I'm too lazy to air up and down air bags!).

On edit: In response to your question on damage, I found that the porposing caused the rear sofa in our RW to move around because of the porposing, it could hit the trim around the rear window and possibly damage the screen. I put a 2x4 vertically up between the sofa and the rear wall, this prevents the backward movement of the sofa
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Old 07-21-2014, 02:32 PM   #10
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Quote:
Originally Posted by rob_fla View Post
We have the same setup, 38FL with the Tri Glide Pin Box with Air Bag.
Our first pull from Tampa FL to Tallahassee FL was pretty rough.
Been playing with the air pressure in the Air Bag, yesterdays trip down was much better.
The RW was hitched a little high, I lowered the hitch last week one position.
Adjusted the pressure in the Hitch Air Bag to 60 Psi, much better trip yesterday from Tallahassee FL to Ft Myers FL (Yep right back down I-75 past Tampa FL to Ft Myers)
There are some pretty bad sections of road under construction around the Tampa area.

Still had a few hard hits which I believe is a combination of the Hitch Air Bag unloading the Trucks overload springs causing a pretty hard bounce.

My trailer has a heavy pin weight but I keep my air bags inflated to 90 psi while I'm hooked up. I then deflate them to 10 when empty.

I always run with my cruse control set
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