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Any one have the J&M 2005-Pres Street/Race Extreme Joint upper and Lower Control Arms


dingo2008

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The biggest problem with this type of joint is. It has to be adjusted as it wears. If its not adjustable. Then in a very short time of street driving. They start to clunk.

 

If its a street car. Then i wouldn't run this type of control arm. I would get one recommended for the street. I adjust mine about every three months. Its an 2007 with 10K miles. Just to give an idea of the maintenance required to run these control arms. One big problem is i don't believe the J&M's are adjustable.

 

At a track they do very well. Probably one of the best.

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I thought I seen they have a life time warranty on their bushings, it's a steel ball surrounded by poly, why would it wear that fast. This isn't a spherical bearing type or lined with nylon so I don't see why they would warranty them if they wear out that fast.

 

 

I cant answer for the J&M joints. But i have read a few threads were guys that bought them. Were complaining about clunking noise. The ones i run are adjustable. So they will last a life time. You just have to adjust-em. Yes the ones i have are Nylon and they do wear. I can adjust mine with out removing the joints or arms. There is a allen head set screw. You just remove it and adjust the joint. Not sure if the J&M's are the same. Maybe someone that has the J&M's can chime in.

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All the reviews I have found on them say they are more quiet than their factory control arms, can yu post links to the threads where you found people saying they had noises. J&M does have a life time warranty on their bushings so not sure they would warranty something like that for so long if they went bad or made clunking noises. Mine will be here Tuesday so maybe some time late next summer I will post a review on what I think of them and it there is any noises after I drive on them for a while. It's winter time here so won't be testing them any time soon.Thanks

 

Ryan

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All the reviews I have found on them say they are more quiet than their factory control arms, can yu post links to the threads where you found people saying they had noises. J&M does have a life time warranty on their bushings so not sure they would warranty something like that for so long if they went bad or made clunking noises. Mine will be here Tuesday so maybe some time late next summer I will post a review on what I think of them and it there is any noises after I drive on them for a while. It's winter time here so won't be testing them any time soon.Thanks

 

Ryan

 

I'm not going to go hunt up the threads. If you don't believe me. Then buy-em. No aftermarket control arms is as quiet as the stock ones. Roush racing rubber bushing control arms are probably the best for no noise.

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If your not doing serious racing, huge HP, or really "Hooking" at the track the Street version should be just fine if your concerned about added NVH (lifetime warranty on the bushings). Also BMR makes at least as good a LCA as J&M if not better, J&M holds the trophy in my eyes for the double adj. UCA (street version).

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Already ordered the Extreme joints, I asked J&M about some one saying they had clunking sounds and he said they were installed improperly, said they could have done a few things wrong, one not putting the anti clunk bushing in since ford used an over sized hole for the bolt. I know the streets would have probably been more than enough but figured I'd try these out since I only spet $339 on the upper and lowers. Now just waiting for J&M to make there heavy upper control arm bracket hopefully they have it for sale with in the next couple months

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  • 2 months later...

American muscle was cheaper, free shipping, plus $15 off and in stock, sorry I'm sure there is more things I can order from you.

 

 

Hey man i just put on my lower control arms from J&M(non joint version), and love them, Now I just ordered the J&M extreme/joint adj.upper control arm that you have, gotta straighten out my pinion angle,lol..................Was wondering how the uca is holding up for you? Are you happy with it still? Any added clunking or noises?????

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  • 6 months later...

Hey, I just investigating lower and upper control arms for the 08 GT500. I have come across a couple of hibrid type control arms with poly on one end and combination sherical joint with plastic on the other end. As I have been reading there is a potential for binding with an all poly type bushings on both ends, so I am not planning on using these. My main goal is to stop the hop and more predictable cornering.

So here's my question, has anyone used the parts manufacturered by Spohn, or UMI? It seems to me these are similiar to the D&R products. Any experience anyone could share would be appreciated.

Spohn calls their joint:

Del-Sphere Pivot Joints:

 

"The Spohn Performance Del-Sphere pivot joint solves the short comings of the factory rubber and aftermarket polyurethane bushings. Our Del-Sphere pivot joint incorporates a spherical ball which is surrounded by delrin bushing cups. This combination allows the control arm to articulate like a spherical rod end (28 degrees of available rotation) during cornering but the spherical ball does not allow the bushing to deflect during acceleration. This provides for great straight line traction like polyurethane bushed control arms but remains completely bind free like a spherical rod end during cornering for predictable traction in the corners.

 

Think of the Del-Sphere pivot joint as a Delrin bushed spherical rod end. After over a year of R&D testing here at Spohn Performance on a streetable spherical joint the Del-Sphere pivot joint is the final result. Designed and manufactured exclusively by Spohn Performance, we have taken street suspension performance to the next level. Our Del-Sphere pivot joint features a one piece forged and heat treated chrome moly housing, a heat treated and chrome plated chrome moly spherical ball, Delrin bushing cups, heat treated retainer washer and snap ring, heat treated and chrome plated chrome moly threaded adjuster ring, an external grease fitting and a beautiful silver zinc plated housing finish. The delrin bushing cups absorb shock and road noise so you get the quiet and smooth ride of a bushing as well as 28 degrees of rotation! Our Del-Sphere pivot joints will always ship to you fully assembled, however, we also offer an optional adjusting tool that will allow you to do two things. First, you can disassemble the Del-Sphere pivot joint for cleaning, inspection, etc. Second, you can adjust the amount of friction on the spherical ball. Do you want a very low friction pivot joint or a very tight pivot joint? It's up to you, the amount of tension can be easily adjusted by using our optional adjustment tool to tighten or loosen the end retainer ring. What that also means is if over time and miles the tolerances open up you can simply re-adjust the retainer ring and have your pivot joint as tight as it was the day it was brand new. We doubt you'll ever need to replace the Delrin bushing cups, but they certainly can be. Unlike a spherical rod end, the Del-Sphere pivot joint is 100% rebuildable."

 

The UMI calls their joint:

Roto Joint:

This upper control arm is a direct bolt-on replacement and features a spherical Roto-Joint. The Roto-Joint design is a pivot ball lined with a greaseable delrin race designed to offer 28 degrees of total unrestricted movement, more than adequate for a bind free, low friction operation. The Roto-Joint design improves performance over the factory rubber and aftermarket polyurethane bushings by allowing the suspension to articulate correctly, and provides precision handling. The installed UMI Roto-Joint allows rear end free movement when high handling, auto cross or road race is a concern while still being a 100% streetable setup. The installed delrin race, which lines the spherical ball, absorbs shock and road noise for a quiet and smooth operation on any street or track driven vehicle.

Cheers,

Hugh

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