Goodbye Long Arms... hello short arms - Page 38 - JeepForum.com
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post #556 of 731 Old 02-29-2012, 09:33 AM Thread Starter
Robert J. yates
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Originally Posted by OldGloryLJ View Post
Thanks, would that be La Verne, Earth?
.
Yah..... Here on business

I'll get in touch with you later today.


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And yes, I am an exceptional scientist and engineer.
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post #557 of 731 Old 02-29-2012, 09:36 AM Thread Starter
Robert J. yates
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That is one filthy looking lift.

check out my jeep

http://mylifeisjeep.blogspot.com/

Do you comprehend the terms "under construction" and "mock-up"? Next time before opening up your mouth, read the entire thread. That picture was from 2 years ago.

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post #558 of 731 Old 02-29-2012, 12:41 PM
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Originally Posted by mrblaine View Post
I would never re-use the small joint on a single upper due to you now asking 1 arm to do the work that used to be done by two. I firmly believe in using the larger joints found in the lower arms on both ends of a smaller diameter single upper link.

You are welcome to disregard any and all of that drivel though.
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Personally, I think the 2" joints are too small. Even if it were seen as "feasible", my decision is already made up. I'd be much less worried about the cast mount and more worried about that tiny joint. I plan on using 1.25" shank 2.5" JJ's if I move to a single upper.
X2 on all this.
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post #559 of 731 Old 02-29-2012, 01:57 PM
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X2 on all this.
I agree, and have built as such. But I'm wondering if there have actually been any failures, not only just because we *think* it's not enough joint. I know I do, but it's something to think about.

98 TJ 5.9 Stretched and big axles
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post #560 of 731 Old 02-29-2012, 02:07 PM
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I wouldn't be worried about the actual joint or even a bolt (providing you used a 1/2" or larger center ball) failing. The smaller joints are just not as preloaded and the bushing halves are smaller. It certainly wouldn't happen overnight but they'd wear out....at least that's what I feel would be the case. They do fine when sharing the load but the bigger joints have been proven to hold up no matter what for a very long time.

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post #561 of 731 Old 02-29-2012, 02:52 PM
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Originally Posted by pcoplin View Post
I agree, and have built as such. But I'm wondering if there have actually been any failures, not only just because we *think* it's not enough joint. I know I do, but it's something to think about.
It's not a strength issue. You can take a 3/4 x 3/4" rod end and use it in a lower link all day long without approaching it's 40,000 odd pound rated static load capacity, they just wear out faster than the 1 x 1.25's do.

Same with the small upper, the joints will wear faster but I'm pretty sure they wouldn't fail under normal use.

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post #562 of 731 Old 02-29-2012, 03:24 PM
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With the larger upper joint, is the strength enough to compensate for side to side movement of the axle when combined with the 2 lower joints, and the trackbar joints in a DW situation? It seems like only having one upper joint would leave the axle centering responsibility to the track bar joints and the lower control arm joints... so should all of those be upgraded as well?
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post #563 of 731 Old 02-29-2012, 03:30 PM
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so should all of those be upgraded as well?
How do you intend to upgrade over the big 2.5" JJ's?

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post #564 of 731 Old 02-29-2012, 03:49 PM
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Originally Posted by Imped View Post
How do you intend to upgrade over the big 2.5" JJ's?
why the billet chromolly joints with the chemically polished center balls of course
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post #565 of 731 Old 02-29-2012, 04:20 PM
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Originally Posted by Necromancer_tat View Post
With the larger upper joint, is the strength enough to compensate for side to side movement of the axle when combined with the 2 lower joints, and the trackbar joints in a DW situation? It seems like only having one upper joint would leave the axle centering responsibility to the track bar joints and the lower control arm joints... so should all of those be upgraded as well?
Pretty sure you could mount 12 parallel links and the trackbar is all that will locate the axle. That's why it's called a TRACK bar. The links aren't going to see any side load from the axle.

98 TJ 5.9 Stretched and big axles
01 F250 Powerstroke 7.3/ZF6

http://www.polyperformance.com/
https://www.4lowparts.com/
http://www.blackmagicbrakes.com/
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post #566 of 731 Old 02-29-2012, 04:41 PM
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How do you intend to upgrade over the big 2.5" JJ's?
I don't. They're nice and beefy. I'm curious about the axle side to side movement while only using one upper joint? I'm not saying it isn't plenty, I'm just wondering how it compares.

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Originally Posted by Climbit View Post
why the billet chromolly joints with the chemically polished center balls of course
The new Billet joints are sexxy, but not what I'm wondering about.

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Originally Posted by pcoplin View Post
Pretty sure you could mount 12 parallel links and the trackbar is all that will locate the axle. That's why it's called a TRACK bar. The links aren't going to see any side load from the axle.
First off, there would be no need ever for 12 parallel links to locate an axle. Second, at the axle side only 3 attachment points are needed to locate it.
Third, the links experience axial loading, thus they see minimal side loads...
4th, a triangulated 4 link has no need for a track bar to locate the axle.
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post #567 of 731 Old 02-29-2012, 04:42 PM
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Originally Posted by Necromancer_tat View Post


First off, there would be no need ever for 12 parallel links to locate an axle. Second, at the axle side only 3 attachment points are needed to locate it.
Third, the links experience axial loading, thus they will never never see side loads...
4th, a triangulated 4 link has no need for a track bar to locate the axle.
Really? Then WTF are you asking above?

98 TJ 5.9 Stretched and big axles
01 F250 Powerstroke 7.3/ZF6

http://www.polyperformance.com/
https://www.4lowparts.com/
http://www.blackmagicbrakes.com/
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post #568 of 731 Old 02-29-2012, 04:51 PM
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Really? Then WTF are you asking above?
I was asking if the larger single upper joint in a 3 link set up was strong enough to help the track bar out in reguards to keeping the front axle in line.
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post #569 of 731 Old 02-29-2012, 05:05 PM
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The stock location upper link does not help the track bar keep anything in line in the first place, so the point is moot.
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post #570 of 731 Old 02-29-2012, 05:10 PM
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The stock location upper link does not help the track bar keep anything in line in the first place, so the point is moot.
Really? So, if I remove all four control arms and push on the axle directly sideways, it won't move to the front or back?

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control arms , currie , custom , fabrication , long arms , mod , modification , savvy , short arms , suspension , tj , wrangler

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