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Trailing arm bushing material

2011jk

Member
Joined
Apr 28, 2021
Messages
13
I have white one's now..not sure what they are, maybe Derlin? but would like to replace with something better that won't crack.
Thinking UHMW or maybe oil light bronze or?

Trailing arms are under a Heavy...7k loaded JK, strapped now at about 18" travel. I'm getting some rear steer from the flex of the material.

Thanks
 

EddieHall

Well-Known Member
Joined
Jan 15, 2013
Messages
805
Location
Pensacola
Aluminum bronze, or aluminum would probably work. oilite is made for high speed tight tolerance applications
 

ridered3

Not Rigless
Joined
Jun 24, 2010
Messages
6,226
Location
Rockvale, TN
I have white one's now..not sure what they are, maybe Derlin? but would like to replace with something better that won't crack.
Thinking UHMW or maybe oil light bronze or?

Trailing arms are under a Heavy...7k loaded JK, strapped now at about 18" travel. I'm getting some rear steer from the flex of the material.

Thanks

No help on the bushings, but got any pics of the rig?
 

Bebop

Well-Known Member
Joined
Jan 27, 2013
Messages
1,693
I have white one's now..not sure what they are, maybe Derlin? but would like to replace with something better that won't crack.
Thinking UHMW or maybe oil light bronze or?

Trailing arms are under a Heavy...7k loaded JK, strapped now at about 18" travel. I'm getting some rear steer from the flex of the material.

Thanks

Would help with a pictures of the setup.

Usually trailing arms are made either with the shocks under the centerline of the link and you don't need wobble control (you can use 2 normal heims at each end) or with some kind of wobble control, like this :

1443rev_a_web-2_620x.jpg


Some vendors:



The 4" setups are heavy duty.
 

2011jk

Member
Joined
Apr 28, 2021
Messages
13
I am familiar with wobble joints I'm just not sure that they will stop all horizontal movement of the arms.
Maybe Kartex joints will?


Shocks are not mounted below the centerline of the trailing arms.
 

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Last edited:

TBItoy

Well-Known Member
Joined
Jul 2, 2010
Messages
10,633
Location
Dodson Branch, TN
you can't "stop all horizonal movement of the arms". They have to be able to move a bit if you want to be able to articulate the suspension. They don't just move straight up and down.
 

2011jk

Member
Joined
Apr 28, 2021
Messages
13
10-4

I'll look at the brackets to see if I'm getting any deflection in them, 1/4" plate now .
 

Bebop

Well-Known Member
Joined
Jan 27, 2013
Messages
1,693
Ohhhh, I think I've seen pics of that unit. LMF did some of the work on it, right ?

Given the size of the vehicle and the setup, I'd give a serious look at the BKOR 4" wide antiwobble joints.
 

2011jk

Member
Joined
Apr 28, 2021
Messages
13
Yep..Phil helped and setup the trailing arms and tuned the shocks.
Your viewpoint why 4" vs 2.625"
I would think having bushings with 0* offset in my case would be better.
 

Bebop

Well-Known Member
Joined
Jan 27, 2013
Messages
1,693
That's what I thought. Beautiful car !

BKOR setup is a 0* of free play.
TMR is 4* on each side.

Why 4" vs 2.63" ? Because the uniball width inside are the same in both cases but in a 4" wide system you have 0.685" of extra material per side to spread the load. It does require you to change the chassis side brackets though.

I have the TMR 2.63" on my buggy.
Like you, I don't like the 4* of free play and, like you, I see a lot of wear on the delrin bushings.
The owner of BKOR used to run that exact setup and created the 4", 0* play joint that they sell in order to provide an answer to the shortcomings of the TMR system.
 

2011jk

Member
Joined
Apr 28, 2021
Messages
13
First I'll try a temp fix..as my trailing arms are powder coated and heat treated so modding them for the BKOR will be a $$ pain, time pain plus redoing the frame mounts.

My bud will machine new bushings but with a sleeve which should help..at least temporarily.
Sleeve material TBD plus amount if any past the bushing.

Note to self...cry once build it like $ isn't a issue.
 

wizzo

Well-Known Member
Joined
Dec 5, 2007
Messages
1,926
Location
glasgow, ky
Why not put delrin on either side of shock eyes on the trailing arms to go along with the delrin on either side of the trailing arm bushing? A lot of guys use this set up or a variation.
 

Bebop

Well-Known Member
Joined
Jan 27, 2013
Messages
1,693
It's been proven to work pretty good.
By Randy Slawson amongst others people.

That said, I've never seen it done on a 7k+ vehicle.
 

2011jk

Member
Joined
Apr 28, 2021
Messages
13
Rear steering from the horizontal movement in the frame mounted trailing joint.
This is only on the street..trails never notice it..
 

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