Torn trailing arm bushing - Defender Source
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  #1  
Old November 25th, 2012, 09:11 PM
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Torn trailing arm bushing

On my way home from a recent trip to the Cove, I noticed the truck developed a decent amount of rear steer and upon further investigation I found this! The Polybush trailing arm bushing on the LH side (rear of the frame mount) had torn and was now wrapped around the large washer. Anyone had this problem before? I know I have read varying issues with polybushings but as I have had these bushing on my truck for less than a year wouldn't have expected this!
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  #2  
Old November 25th, 2012, 09:58 PM
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Poly bushings are crap
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  #3  
Old November 26th, 2012, 06:14 AM
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Mixed bag here, I've never had issues with Genuine Bushings.
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Old November 26th, 2012, 07:53 AM
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Happened to me at the Cove last year as well!

I now carry spare bushings, and still use poly over rubber.
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Old November 26th, 2012, 08:14 AM
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Stuck with rubber for the longest time. Nothing obviously beneficial from poly in use
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Old November 26th, 2012, 08:19 AM
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It makes me think something else is up. You have more flex than me, but we run the same kind of trails (if not the exact same ones during the life of this bushing) and this is the second one you have torn while mine are still ok (poly too). Does it keep happening to the same side?
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Old November 26th, 2012, 08:34 AM
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Quote:
Originally Posted by cgalpin View Post
It makes me think something else is up. You have more flex than me, but we run the same kind of trails (if not the exact same ones during the life of this bushing) and this is the second one you have torn while mine are still ok (poly too). Does it keep happening to the same side?
Huff is ruff !
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  #8  
Old November 26th, 2012, 09:18 AM
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Thinking about it some more, I do have cranked trailing arms and mine are red so maybe orange is too soft (or just not huff proof).
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  #9  
Old November 26th, 2012, 09:54 AM
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Very interesting. I've had Orange Poly's for about 15 months now and have been VERY happy with them. I got them from Justin after my brand new rubber bushings peeled off in a donut shaped ring in the middle of a weekend trip. I have RockWare cranked arms and quite a bit of droop.
I'm surprised and disappointed to see yours like this because mine have held up really well.
I had to use hose clamps to keep the rubber in place when my new rubber ones went out.
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  #10  
Old November 26th, 2012, 10:06 AM
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I thought Jeff had cranked arms as well?

Time for some spherical bearings?

Or perhaps someone needs to make kevlar reinforced trailing arm bushes.
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Old November 26th, 2012, 10:16 AM
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The bushing that went bad previously was on the same side but in that case, it was one of the blue bushings and it simply split the way i would expect a bushing to fail. In this case, the bushing literally wrapped itself around the backup washer.

I got my orange polys from Justin as well and have been very happy with them, until this. To Charles' point, I do have 12" 7100's and TF axle mount cones with upper spring retainers but I am not sure exactly how this would adversely affect these bushings. And to Doug's comment, I do exercise some finasse (not a typo as it is a more aggressive style of finesse).

------ Follow up post added November 26th, 2012 10:17 AM ------

Quote:
Originally Posted by sonoronos View Post
I thought Jeff had cranked arms as well?

Time for some spherical bearings?

Or perhaps someone needs to make kevlar reinforced trailing arm bushes.
I do have the same cranked arms (Keith's arms)...and if they were not so damn expensive I would consider the ones from X-eng
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Old November 26th, 2012, 10:24 AM
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Huff, sounds like we have nearly identical set ups. How long were the Orange Poly's in for?
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  #13  
Old November 26th, 2012, 10:29 AM
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Quote:
Originally Posted by fishEH View Post
Huff, sounds like we have nearly identical set ups. How long were the Orange Poly's in for?
I installed them early this year after I split the blue bushing last year at ROTR. When I installed them I still had standard +2 OME shocks and no cones. I installed the new shocks/cones before Conclave.

My plan right now is to try to get a replacement orange poly setup for this link and put it all back together. If I tear another one then I will have to make the choice to either give the reds a try or move on to something different.
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Old November 26th, 2012, 10:56 AM
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Quote:
Originally Posted by jefhuf View Post
I installed them early this year after I split the blue bushing last year at ROTR. When I installed them I still had standard +2 OME shocks and no cones. I installed the new shocks/cones before Conclave.

My plan right now is to try to get a replacement orange poly setup for this link and put it all back together. If I tear another one then I will have to make the choice to either give the reds a try or move on to something different.
Damn that sucks. Now I'm nervous, lol. Check out the trailing arms Jake1996D1 has. Ballistic joint on each end. If I change anything it will be to go to something like that. His mount to the stock chassis mounts using adapters. If I had a set made I'd eliminate the stock chassis mount and use some Ruff Stuff weld on mounts. Eliminating the stock chassis mounts would mean I would eliminate my frame sliders too.
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Old November 26th, 2012, 11:01 AM
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Quote:
Originally Posted by jefhuf View Post
I do have 12" 7100's and TF axle mount cones with upper spring retainers but I am not sure exactly how this would adversely affect these bushings.
Your ridiculous droop must be creating a sharp angle at the bushing and pushing it through the hole.

And I mean ridiculous. His cones need cones!
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Old November 26th, 2012, 11:06 AM
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Quote:
Originally Posted by sonoronos View Post

Or perhaps someone needs to make kevlar reinforced trailing arm bushes.

The sad part is, there wouldn't be as much interest in a useful part like reinforced bushings as there would be for say, a fancy fire extinguisher mount.
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Old November 26th, 2012, 11:26 AM
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I think the solution lies with the washer and not the bushing. I think CG hit the nail on the head with the suggestion that the washer was cutting into the bushing. The inside of the washer should be a curve, not a flat so that as the arm angle increases the bushing has some squeeze-out room. Maybe a washer that is somewhat larger in diameter than the bush and has a rolled edge with a slight dish is the ticket. Anyone have a lathe handy?
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Old November 26th, 2012, 11:27 AM
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Quote:
Originally Posted by cgalpin View Post
Your ridiculous droop must be creating a sharp angle at the bushing and pushing it through the hole.

And I mean ridiculous. His cones need cones!
So what's my excuse for running old stock bushings with no issues then?
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Old November 26th, 2012, 11:28 AM
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Originally Posted by crown14 View Post

The sad part is, there wouldn't be as much interest in a useful part like reinforced bushings as there would be for say, a fancy fire extinguisher mount.
At $75 too.
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Old November 26th, 2012, 11:32 AM
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It sounds like Charles is running the same trails without all of the extra suspension wizardry. If you went back to a more mild setup to increase durability, or would it change your offroad ability.

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