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Old December 30th, 2015, 12:21 PM   #1
green50gt
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Arrow Rear 4-link/Stretch TJ, Size question.

Hi friends.

I bought a rubicon sans axles/suspension/wheels-tires. It already has a stretch tank in it, thinking about a small stretch.

Would run 1.25" heims or Johnny's and bushings on the lowers, likely Johnnys.

I am questioning the uppers. 7/8x3/4"? That too big?

This Jeep in my possession will be light wheeling at best, sand dunes, and driven daily.

Next...the upper adjustable brackets, frame side. There are 10 and 30 degree options. Realize it kinda depends on the length of the arms - BUT I figure this has been done enough that there may be an apparent easy answer.

Thank you, and good day folks.
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Old December 31st, 2015, 09:23 AM   #2
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Ok, well this is awkward.. I was told by buddy 7/8x7/8 on the uppers?

I'll start calling people out... @Tacker @bbaXJ @whiterhino. Thoughs please.
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Old December 31st, 2015, 09:31 AM   #3
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I'd avoid heims unless you have a space constraint. I have 3 heims on my entire Jeep. They work fine, just tend to get noisy and in my experience, wear faster since they're not easily greasable.

For what you're doing I'd put adjustable Johnny Joints at one end of the arms, fixed poly bushings at the other. Lower arms 2" 1/4" wall DOM with 1" or 1.25" shank(might as well go with the larger since Forged JJs are available in that size), uppers you can get away with much smaller since they won't be seeing impacts. Mine are 1.5" .25" wall with 3/4" shank joints.

The angle on the brackets depends what you do for link geometry. Are you triangulating the uppers or sticking with the panhard bar? You'll want the more angled mounts for triangulated, straight or 10 for straightish arms.
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Old December 31st, 2015, 09:32 AM   #4
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Or just do whatever is cheapest since you're gonna sell it in a month anyway
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Old December 31st, 2015, 10:05 AM   #5
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Quote:
Originally Posted by bbaXJ View Post
I'd avoid heims unless you have a space constraint. I have 3 heims on my entire Jeep. They work fine, just tend to get noisy and in my experience, wear faster since they're not easily greasable.

For what you're doing I'd put adjustable Johnny Joints at one end of the arms, fixed poly bushings at the other. Lower arms 2" 1/4" wall DOM with 1" or 1.25" shank(might as well go with the larger since Forged JJs are available in that size), uppers you can get away with much smaller since they won't be seeing impacts. Mine are 1.5" .25" wall with 3/4" shank joints.

The angle on the brackets depends what you do for link geometry. Are you triangulating the uppers or sticking with the panhard bar? You'll want the more angled mounts for triangulated, straight or 10 for straightish arms.

BAM! You're the man. That's what I was looking for! Thank you!
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Old December 31st, 2015, 10:07 AM   #6
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Or just do whatever is cheapest since you're gonna sell it in a month anyway
Your words are hurtful.












But true.

For what it's worth I am working towards a 4 door.. We just had a baby 2 weeks ago....surprize #3, so I need 5 seats.
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Old December 31st, 2015, 01:06 PM   #7
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My old Jeep had 2" 1/4 wall lowers with a Johnny Joint on 1 end and a fixed bushing on the other end. My uppers were 1 1/2" 1/4 wall. We drilled them out and tapped them for 1.25 threads. The uppers had RH/LH Johnny Joints. .
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Old December 31st, 2015, 01:10 PM   #8
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Love my JJs
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Old December 31st, 2015, 05:06 PM   #9
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I'm running all 7/8 heims for about a year now. Been driven on the highway/dunes/rocks and they are still dead silent. If you want any brackets I have drawings for all my 3/4 link brackets and can get them laser cut and shipped out with your adapter if you have any interest

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Old December 31st, 2015, 05:16 PM   #10
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I went with trail gear creeper joints and Barnes4wd forged Poly bushings.
http://www.barnes4wd.com/Forged-Poly-Joint_p_419.html
http://m.summitracing.com/parts/TGI-110761-KIT

I bought artec link bracket.
http://www.artecindustries.com/Dual-...air_p_253.html

I plan on using some 2-1/4"Dia 7075 T651 Aluminum for my links.
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Old December 31st, 2015, 05:41 PM   #11
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I have 1.75 links with 3/8 wall all around with 1.25 shank johnny joints. I had Ballistic joints before and they were junk. I also had 1/4 links that bent, hence the 3/8 wall this time. So far after 2 years they are still straight. Aluminum will give you some weight savings but it's more expensive. Your choice IMO.
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Old December 31st, 2015, 05:49 PM   #12
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Been happy with them on the buggy.
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Old December 31st, 2015, 05:52 PM   #13
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Quote:
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I have 1.75 links with 3/8 wall all around with 1.25 shank johnny joints. I had Ballistic joints before and they were junk. I also had 1/4 links that bent, hence the 3/8 wall this time. So far after 2 years they are still straight. Aluminum will give you some weight savings but it's more expensive. Your choice IMO.
I've got Ballistic joints in my uppers(leftover from the Scrambler build) and no complaints so far. JJs are definitely the common choice, what I recommend people, and what I have on both ends of my lowers. My lowers are 2-1/4" 3/8" wall and are dead straight so far, but they're overkill for most people. If you won't be smashing rocks left and right, which it sounds like the OP won't, I'd say 2" 1/4" wall is the way to go.
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Old December 31st, 2015, 11:20 PM   #14
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So all of you except for Ryan are running 1.25 shank uppers if I am reading this right. Noted.
@Ryanw10 yeah I would be interested in seeing said brackets. You back now?
@CheapThrillB2 I do like that artec bracket, thanks for passing that a long.

Thanks for the help thus far gents, really appreciate it.
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Old December 31st, 2015, 11:26 PM   #15
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i run 7/8" heims with 3/4 shank on my upper arms and front track bar with 1.25" shank lowers on my tj. My lower links are 2" 1/4 wall and three out of four are bent after a year and beat downs.
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Old January 1st, 2016, 08:28 AM   #16
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Quote:
Originally Posted by green50gt View Post
So all of you except for Ryan are running 1.25 shank uppers if I am reading this right. Noted.
@Ryanw10 yeah I would be interested in seeing said brackets. You back now?
@CheapThrillB2 I do like that artec bracket, thanks for passing that a long.

Thanks for the help thus far gents, really appreciate it.
Not back yet, trying to find the right truck down here has proven to be much harder than I thought. Im heading to orlando today and then driving back for sure tomorrow so ill be back sunday. Ill get lots of pictures of all my brackets.
I have bashed my 1.5" x .25" lowers off rocks time and time again, after every trip there is no paint left on the bottom side of the arm and they are still straight. I believe part of the reason is because I did more of a mid arm set up so less leverage to bend them.
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Old January 1st, 2016, 09:34 AM   #17
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Yeah, if I do it I was certainly wanting a mid arm setup. I feel like a flat belly is kind of a catch 22 when your mounts are right there.
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Old January 1st, 2016, 10:05 AM   #18
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Quote:
Originally Posted by green50gt View Post
So all of you except for Ryan are running 1.25 shank uppers if I am reading this right. Noted.
@Ryanw10 yeah I would be interested in seeing said brackets. You back now?
@CheapThrillB2 I do like that artec bracket, thanks for passing that a long.

Thanks for the help thus far gents, really appreciate it.
My lowers shanks are 1.25", uppers are all 3/4".

I'd go with something similar to this for mounts. Mine turned out similar but more vertical separation. With 1/4 ton axles you likely won't have as much separation at the axle end either, so these will work fine.
http://www.polyperformance.com/Artec...-link-Brackets
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Old January 1st, 2016, 10:46 AM   #19
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Those are pretty nice.
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