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Old 05-07-2018, 06:06 PM
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Jeep Body Trailer Fishtailing

Any advice on getting this trailer to pull straighter?

I was thinking ditch the air bags and go leaf spring but id like to keep it. It only has 2 arms, maybe a trackbar would help? Maybe extend the tounge?

Its very light weight, short in length and tall in height, and not arrow-dynamic.

It pulls pretty bad above 20mph (swaying) and if you hit 50 you feel like the jeep may roll.

Trying to rethink this design

Thanks in advance



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Old 05-07-2018, 08:13 PM   #2
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Sounds like it could be a weight issue
https://www.engineersedge.com/calcul...ht-balance.htm
Another helpful site with a spreadsheet link at the bottom of the page to help
Trailer Balance 101
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Old 05-07-2018, 08:21 PM   #3
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From my limited knowledge, weight distribution is key. You have to have downward force on the tongue. Try taking some weight and putting it in very front and see if it pulls better. Also as not as much as weight distro, aerodynamics of the bottom has a bit to play. A drop hitch to take the nose down, this way the wind won't try to lift the weight off the hitch ball. This usually comes into play the faster you go.
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Old 05-07-2018, 10:58 PM   #4
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I was scrolling to another area on this site and this jumped out at me...

Seriously, This is a huge problem and could throw you right off the road... and that is if you are lucky.

Can you send the dimensions? Aside from the poster above, who is absolutely correct, it could be the length or the positioning of the wheels as well

Last summer, two pallets of stone were improperly placed in my Bri-Mar 6x10
Hydraulic trailer and almost lost it. Not only were there cars behind me, there were some passing on me on the side.

People started to pulling off to the side of the road and just assumed I was going to eat shit doing 40-45 mphs. I was a noob at the time and didn't realize he placed the pallets improperly in the trailer. Always bring coffee for the guy loading your truck at 6am.

Safety is a huge concern of mine and have my reasons... Actually, I am probably more of a pussy when it comes to vehicles and possible danger.

Please be careful and remember that the person behind you could always have a family just like yours.
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Old 05-08-2018, 05:38 PM
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Originally Posted by Owner89 View Post
I was scrolling to another area on this site and this jumped out at me...

Seriously, This is a huge problem and could throw you right off the road... and that is if you are lucky.

Can you send the dimensions? Aside from the poster above, who is absolutely correct, it could be the length or the positioning of the wheels as well

Last summer, two pallets of stone were improperly placed in my Bri-Mar 6x10
Hydraulic trailer and almost lost it. Not only were there cars behind me, there were some passing on me on the side.

People started to pulling off to the side of the road and just assumed I was going to eat shit doing 40-45 mphs. I was a noob at the time and didn't realize he placed the pallets improperly in the trailer. Always bring coffee for the guy loading your truck at 6am.

Safety is a huge concern of mine and have my reasons... Actually, I am probably more of a pussy when it comes to vehicles and possible danger.

Please be careful and remember that the person behind you could always have a family just like yours.
I just bought the trailer, only driving ive done was bringing it home slowly empty. Im well aware it needs to be fixed and is a safety concern, thats why I posted it. I watched one of these get built on truck u and the only difference was leaf springs and a longer tounge. Im thinking that would make a difference. Tires dont seem worn uneven or anything of the sort.

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Old 05-09-2018, 06:52 PM   #6
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Longer tongue should help. Check wheel balance and like someone else said add some weight to it. Go from there.
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Old 05-09-2018, 07:39 PM   #7
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With only 2 arms they need to either be triangulated or a track bar. as pictured there is nothing to keep the axle from shifting side to side. also the axle should be located 1 inch behind center for every foot of total length including the tongue length.
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Old 05-11-2018, 12:21 PM   #8
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An overall pic would help. I am thinking it is a tongue weight issue. There is math and calculators out there to help determine exactly what is needed, but that will all change when you load your trailer anyway. Try to keep as much weight in front of the axle as your tow vehicle will easily handle. You want it to squat a little so you know you are applying some tongue weight.

As far as axle design and suspension design... are the links welded solid to the axle? They appear to be. That should minimize side to side movement, but a simple track bar would not hurt.
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Old 05-12-2018, 09:09 AM   #9
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The other thing to look at is the wheel and tire choice. You should get a wheels white less backspacing. The tires are rubbing on the frame.
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Old 01-09-2019, 02:16 PM   #10
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1. Definitely need a track bar, also called a Panhard (after the inventor). Like this one.
https://welderseries.com/Universal-P...Rear-p51463697
2. Trailers need some amount of toe-in to naturally self-center. About 1/2 to 1 degree should do it. If this is an axle made for a trailer, you could have installed it backwards.
3. Looking at your axle with air bags, it may be hard to do a stock Panhard. I once did this with an upper control arm and a ball-joint to keep the axle centered. Like this one
https://www.speedwaymotors.com/Speed...nch,33699.html.
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Old 01-15-2019, 06:55 PM   #11
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definitely need a track bar, then you should be ok. might want to add some shocks. you may want to upgrade to a trailing arm setup , think old VW or adventure trailer, or smittybilt trailer.



you dont want leaf springs. i had one with leafs and it rode horribly offroad. It shook up all my beer causing them to leak out of the caps. I quickly went to a trailing arm with air bag, sold that beast to fund a smittybilt trailer which has coils and rides great everywhere.
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Old 01-16-2019, 06:20 PM   #12
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Last post by CountryBoyJeep was 5-16-18.
I wonder if he ever got this sorted out.
If he did, I'm betting a track bar was the solution. A longer tongue and weight distribution may have helped also. We don't know the dimensions of the trailer frame, nor where the jeep body sits on the frame.

He was also having an issue with an engine pulley I think. Since we haven't heard from him recently hopefully he's out with his Jeep and trailer having fun and hasn't sold it in frustration.

Good Luck, L.M.
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Old 01-21-2019, 08:41 AM   #13
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Trailer

Watts link(panhard bar) or leaf springs = the only way out of your problem. Also, some trailer axles are made with coil springs wrapped around the main tube on each side. They will work also.
I've towed this race car N.Y. to Cali. a number of times, without an issue on my home made trailer back in the day.
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Old 01-25-2019, 08:08 AM   #14
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Watts link(panhard bar) or leaf springs = the only way out of your problem. Also, some trailer axles are made with coil springs wrapped around the main tube on each side. They will work also.
I've towed this race car N.Y. to Cali. a number of times, without an issue on my home made trailer back in the day.
FWIW, this trailer had the wrap around coil springs on the main tube.
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Old 01-25-2019, 07:59 PM   #15
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Old 02-04-2020, 08:04 AM   #16
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It's very simple, one needs 10-15% of total trailer weight on the tongue. I've fixed this on a few trailers.

Making the tongue longer would take weight OFF of the hitch.
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Old 02-04-2020, 08:18 AM
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It's very simple, one needs 10-15% of total trailer weight on the tongue. I've fixed this on a few trailers.

Making the tongue longer would take weight OFF of the hitch.
This thread has been long dead, it was handled. I didnt find anything more than I didnt already know

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Old 02-04-2020, 09:16 AM   #18
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Originally Posted by gkesseru View Post
1. Definitely need a track bar, also called a Panhard (after the inventor). Like this one.
https://welderseries.com/Universal-P...Rear-p51463697
2. Trailers need some amount of toe-in to naturally self-center. About 1/2 to 1 degree should do it. If this is an axle made for a trailer, you could have installed it backwards.
3. Looking at your axle with air bags, it may be hard to do a stock Panhard. I once did this with an upper control arm and a ball-joint to keep the axle centered. Like this one
https://www.speedwaymotors.com/Speed...nch,33699.html.
Toe - out would definitely make it go all over the place....
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Old 02-04-2020, 01:47 PM   #19
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This thread has been long dead, it was handled. I didnt find anything more than I didnt already know

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So, what was the fix to your issue?
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Old 02-04-2020, 02:09 PM
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So, what was the fix to your issue?
I converted it to the timbren axleless system so who is to say. Could have been toe, could have been a panhard bar

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