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Old 05-08-2011, 11:25 AM   #1
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Air Bags

Greetings,

I have a question. We have a new 2010 29BHS JayflightG2 and 2010 RAM 1500 5.7 HEMI. Our truck has no problem towing the trailer but we notice that the rear end is still more than a bit down even when I use my EQ bars on the 5th rung. I do have a 800LBS hitch and EQ system. I could get a 1200LBS but for the cost of a new hitch and EQ system I could put in new airbags into the rear end.

I have thought about putting in Bridgestone Airbags into the back coil springs.

Thoughts? Comments? Experiences?

Thanks,

Rob
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Old 05-08-2011, 11:34 AM   #2
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Can you upgrade just the spring bars on the hitch to 1200 lbs, or would you need a whole new hitch? Some folks do use airbags to level out the truck, I have Timbrens which act as helpers when the truck squats to a certain point. But the truck still squats somewhat due to the heavy tongue weight of my TT until it rests on the Timbrens. I suspect airbags would be better at leveling. BTW welcome to the forum!
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Old 05-08-2011, 11:55 AM   #3
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Welcome to the Jayco Owners Forum Daedalus3!

Just our early experience with hitches and our 1/2 ton..... Our dealer ran out of the Equalizer and had to install a one sway bar Huskey system (1200lb) temporarily. We had to drive home with that system with our front end of tv higher and back lower than it should be, and sway probs from tt. We stopped to have the Huskey adjusted a couple of times on our trip back to Cali from Indiana. Still had sway probs. Found in the Huskey literature that with the length of tt, we should have two bars. In Cali, the dealer installed the Equalizer system. Front end of tv much lower and now just a rare sway in high gusty winds. Our rear end is still soft though, and a hitch dealer suggested we consider (bags?) adding something to the tv rear to make it more firm. Hope this helps
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Old 05-08-2011, 12:30 PM   #4
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I've got air bags on my truck and love them. I had them before the camper to help level the truck when pulling other trailers, or having a large load in the back. I've got the WD system set up correctly, but the truck still squats a bit in the rear, especially when I load it up with a weeks worth of camping supplies. The bags help level the truck back out so that everything is lined up correctly. I recommend them to anyone that does any kind of consistent hauling.
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Old 05-08-2011, 12:36 PM   #5
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Quote:
Originally Posted by Crabman View Post
Some folks do use airbags to level out the truck, I have Timbrens which act as helpers when the truck squats to a certain point. But the truck still squats somewhat due to the heavy tongue weight of my TT until it rests on the Timbrens. I suspect airbags would be better at leveling. BTW welcome to the forum!
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I've got air bags on my truck and love them. .
I guess I will have to google Timbrens, but can you give us an idea how much those or airbags cost? Are they 'make specific' or will they fit any 1/2 ton ?

Also, what do you know about warranty for truck? We have a little over a year left on our F-150 warrranty, did adding bags to your truck void the suspension warranty?

Thanks
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Old 05-08-2011, 12:52 PM   #6
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Here's some things to focus on:

Rule 1 - Vehicle must be level or slightly high. Load up the rear of your Vehicle (with NO trailer connected) as if going on a normal camping trip. Firewood, peddle bikes, etc. etc in the rear. If your Vehicle's rear has SAG, then Air Bags, Timbrens or some other vehicle rear suspension product is needed. Always remember that a "loaded" vehicle must me level (or rear slightly high) BEFORE connecting a trailer to it. If it has sag, then its rear suspension must be beefed up.

Rule 2: If Vehicle's rear gets sag when trailer is connected, then "the trailer" is causing the vehicle's rear sag. To remove rear sag from connected tailer, attach a WDS (Weight Distribution System). The bars on the WBS are "sized" on a loaded trailer's SCALE tonque weight. If trailer's tonque is 900 lbs, then bars at 900-1000 lbs are needed. If trailer's tonque weight is 1100 lbs, then get 1000-1200 lbs.

Rule 3: If Vehicle's rear is level (before connecting a Trailer) and trailer's WDS is "sized" properly, then the WDS must be adjusted properly. Properly adjust the WDS settings (re: Ball Height & Spring bar tension adjustments) until proper Vehicle + Trailer "stance" is correct. For many, they like the front of their loaded trailer 2" lower - compared to its trailer rear.

With above in mind, do get your "loaded" trailer's tonque weight on the scale. Thus, giving you a real life number to work with.... To me, it sounds like you need stronger (next larger size) WDW bars...

Hope this helps....

.
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Old 05-08-2011, 01:09 PM   #7
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Quote:
Originally Posted by healthi View Post
I guess I will have to google Timbrens, but can you give us an idea how much those or airbags cost? Are they 'make specific' or will they fit any 1/2 ton ?

Also, what do you know about warranty for truck? We have a little over a year left on our F-150 warrranty, did adding bags to your truck void the suspension warranty?

Thanks
Timbrens, about $180-200

http://www.timbren.com/
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Old 05-08-2011, 01:18 PM   #8
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Timbrens, about $180-200

http://www.timbren.com/
Is that installed or just for the Timbens?
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Old 05-08-2011, 02:06 PM   #9
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Rob,

Welcome to the Jayco Owners Forums.

I pulled up the Jayco published weights on the 2010 29BHS and found: GVWR 7,500lbs, UVW 5,725lbs, and Dry Hitch 750lbs.. Just based on these numbers IMO the 800lb rated WD spring bars are to lite, and may be contributing to the problem.

The UVW is not the ship weight of the TT, so let's assume the ship weight is 5,900lbs.. Add another 200lbs for the battery and dealer options we are at 6,100lbs (realistic). Now get the TT home and load it up for a family camping trip, add another 700lbs (not including any fluids in the tanks), so we are at a loaded TT weight of 6,800lbs..

On a 30'-6" TT you want your loaded tongue weight to be 13%-15% of the loaded TT weight, so based on the 6,800lbs: 884lbs to 1,020lbs would be your ideal loaded tongue weight range. this implies that the WD spring bars should be rated at 1,000lbs minimum (not 800lbs).

For grins, if you were to load the TT up to it's GVWR of 7,500lbs, then the desired loaded TT tongue weight would be 975lbs to 1,125lbs (you could still get away using the 1,000lb spring bars if you were at the 13%). If you knew that you would be towing at the TT's GVWR on a regular basis, the 1,200lb rated spring bars would be better.

It isn't unusual for the rear TV suspension to drop 1"-2" with a properly sized and adjusted WDH, even my 2500HD rear suspension drops at least 1 1/2". The important thing is to return your TV's front suspension back to it's unhitched height when using a WDH.

IMO first invest in a properly sized/rated WDH, correctly adjust the WDH under loaded conditions, and take a test drive. Then revisit the air bag option.

Of course nothing is better than a visit to your local CAT scale to get the "real" weights to work with.

Just food for thought.

Bob
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Old 05-08-2011, 02:39 PM   #10
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Quote:
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Rob,

-snip-
On a 30'-6" TT you want your loaded tongue weight to be 13%-15% of the loaded TT weight, so based on the 6,800lbs: 884lbs to 1,020lbs would be your ideal loaded tongue weight range. this implies that the WD spring bars should be rated at 1,000lbs minimum (not 800lbs).

-snip- If you knew that you would be towing at the TT's GVWR on a regular basis, the 1,200lb rated spring bars would be better.

Just food for thought.

Bob
Here are some numbers for our same model tt.... As shipped, the uvw was 5721#. I'm thinking the tt loaded and including about 1/2 tank of water ran around 7000-7100lbs (sorry don't have those numbers with me right now) with our tt loaded to go camping for just a week with food, etc, and kids along with their 'stuff'.

Dry hitch weight for that year was 800+lbs. We added a battery, of course full tanks, lightest "stuff" to the storage cabinets, topper to the queen bed, typical wardrobe for an extended trip into the bed cabinets, and a few things under the queen bed. We've tried to experiment with packing up the above areas to see which would lower the tongue weight but still work for us as far a storage. Our tongue weights loaded full with propane ran between 1025-1,050 lbs each time we weighed. We adjusted our load again recently, and still need to head to the scales to see where we are now.

No matter, knowing we had such a heavy dry weight to our year model, Jayco (dealer and factory) encouraged us to consider the 1200lb bars just to play it safe. Hope this helps.
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