Synergy MFG Control Arms? - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 12 Old 09-09-2018, 08:58 PM Thread Starter
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Synergy MFG Control Arms?

Okay, so I run basically a Stage 2 Synergy MFG 3" kit on my JKU. The have everything except for the F&R Lower control arms that come with the stage 2 kit.

My question is, should I order the front and rear lower fixed length Synergy control arms to complete the kit how Synergy designed?

OR, should I order the Fixed length front and not worry about the rears?

OR, should I go for the rear uppers and front lowers even though I am not and will not run a rear Double-Cardan aftermarket DS? (Do i really need to be worried about rear pinion angle with only 3" of lift on a 4 door)


Here is a link to the Stage 2 kit,
https://www.synergymfg.com/synergy-j...tegory_id=4055

'15 JKU/ 3" Synergy MFG Stage 2/ Fox 2.0 Performance Series IFP/ 35" KM2/ 4.56 Yukon Gears/ Currie Rock Jock 44/ ARB Locker/ Adams 1310/ VKS Fab/ Evo MFG
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post #2 of 12 Old 09-10-2018, 07:51 AM
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I personally would just do the front lowers. I have put about 60,000 miles on stock rear driveshaft with 2.5-3.5 of lift and no issues.
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post #3 of 12 Old 09-10-2018, 10:46 AM
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Running 3” of life in the rear and stock driveline. 125k miles and no issues . The last 25k i did install rear fixed synergy lowers and adjustable uppers fwiw
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post #4 of 12 Old 09-10-2018, 12:51 PM Thread Starter
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Quote:
Originally Posted by CrazyLarry View Post
Running 3” of life in the rear and stock driveline. 125k miles and no issues . The last 25k i did install rear fixed synergy lowers and adjustable uppers fwiw
Good to know.

I might just go ahead and go with the fixed lowers front and rear and then order the adjustable rear uppers if I need it later on.

'15 JKU/ 3" Synergy MFG Stage 2/ Fox 2.0 Performance Series IFP/ 35" KM2/ 4.56 Yukon Gears/ Currie Rock Jock 44/ ARB Locker/ Adams 1310/ VKS Fab/ Evo MFG
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post #5 of 12 Old 09-10-2018, 12:53 PM Thread Starter
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Quote:
Originally Posted by Jadmt View Post
I personally would just do the front lowers. I have put about 60,000 miles on stock rear driveshaft with 2.5-3.5 of lift and no issues.
Yeah I was running a 2.5" kit earlier, have about 55k on the jeep. I think it should last a while.

'15 JKU/ 3" Synergy MFG Stage 2/ Fox 2.0 Performance Series IFP/ 35" KM2/ 4.56 Yukon Gears/ Currie Rock Jock 44/ ARB Locker/ Adams 1310/ VKS Fab/ Evo MFG
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post #6 of 12 Old 09-10-2018, 01:16 PM
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Quote:
Originally Posted by SilverBulletJKU View Post
Quote:
Originally Posted by CrazyLarry View Post
Running 3” of life in the rear and stock driveline. 125k miles and no issues . The last 25k i did install rear fixed synergy lowers and adjustable uppers fwiw
Good to know.

I might just go ahead and go with the fixed lowers front and rear and then order the adjustable rear uppers if I need it later on.
If you order the fixed lowers for the rear you will need the rear adjustable uppers. The rear fixed lowers are 1/2” longer than stock. You will need longer uppers to compensate and fine tune pinion. I specifically ran the longer rear lowers to push the axle back a bit so I can run 2” bump stops instead o 3”. Either just go with fixed lowers up front or fixed lowers up front and both sets in the rear
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post #7 of 12 Old 09-10-2018, 01:44 PM
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I have to say having adjustable upper and lower is nice , you can push back the rear a bit and tune the pinion. I have new spring perches that have been rotated and moved back so my springs sit straight up now .

Sent from my SM-N950U using Tapatalk

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post #8 of 12 Old 09-10-2018, 02:00 PM Thread Starter
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Quote:
Originally Posted by CrazyLarry View Post
If you order the fixed lowers for the rear you will need the rear adjustable uppers. The rear fixed lowers are 1/2” longer than stock. You will need longer uppers to compensate and fine tune pinion. I specifically ran the longer rear lowers to push the axle back a bit so I can run 2” bump stops instead o 3”. Either just go with fixed lowers up front or fixed lowers up front and both sets in the rear
I was thinking that too, but if that is the case, then why does Synergy sell the Stage 2 kit with only the F&R fixed lowers?

Synergy, in the fixed lower rear CA installation manual says that it's okay to run just the fixed rear lowers,

"These arms are ˝” longer than stock. This length works well when using the
stock length upper control arms and for longer upper control arms when using a
CV style rear drive line and 3-4.5" of lift. If using a CV style rear drive line and
you need the pinion pointed up towards the output on the t-case"

idk...
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post #9 of 12 Old 09-11-2018, 04:53 AM
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Quote:
Originally Posted by SilverBulletJKU View Post
Quote:
Originally Posted by CrazyLarry View Post
If you order the fixed lowers for the rear you will need the rear adjustable uppers. The rear fixed lowers are 1/2” longer than stock. You will need longer uppers to compensate and fine tune pinion. I specifically ran the longer rear lowers to push the axle back a bit so I can run 2” bump stops instead o 3”. Either just go with fixed lowers up front or fixed lowers up front and both sets in the rear
I was thinking that too, but if that is the case, then why does Synergy sell the Stage 2 kit with only the F&R fixed lowers?

Synergy, in the fixed lower rear CA installation manual says that it's okay to run just the fixed rear lowers,

"These arms are ˝” longer than stock. This length works well when using the
stock length upper control arms and for longer upper control arms when using a
CV style rear drive line and 3-4.5" of lift. If using a CV style rear drive line and
you need the pinion pointed up towards the output on the t-case"

idk...
That’s a great question I would call them about that. Me personally I wouldnt want my pinion pointing to far down even when running I a cv style joint.....which I am btw. I’m still on the original rear driveshaft. The more down that pinion is pointing the more likely you’ll tear that boot when the suspension droops. I truely believe if the cv driveline is aligned properly just like a doh ow cardon needs to be aligned you will get more life out of it. I aligned it the same way you would align a double cardon shaft with the pinion 2 degrees less than the driveshaft.
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post #10 of 12 Old 09-11-2018, 10:36 AM Thread Starter
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Quote:
Originally Posted by CrazyLarry View Post
That’s a great question I would call them about that. Me personally I wouldnt want my pinion pointing to far down even when running I a cv style joint.....which I am btw. I’m still on the original rear driveshaft. The more down that pinion is pointing the more likely you’ll tear that boot when the suspension droops. I truely believe if the cv driveline is aligned properly just like a doh ow cardon needs to be aligned you will get more life out of it. I aligned it the same way you would align a double cardon shaft with the pinion 2 degrees less than the driveshaft.
Yeah I emailed Dave about it. I'll post back when he replies.

'15 JKU/ 3" Synergy MFG Stage 2/ Fox 2.0 Performance Series IFP/ 35" KM2/ 4.56 Yukon Gears/ Currie Rock Jock 44/ ARB Locker/ Adams 1310/ VKS Fab/ Evo MFG
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post #11 of 12 Old 09-11-2018, 04:26 PM
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I did front lowers and rear uppers when I first lifted.

Ran for years like that until I did my rear stretch fookery.

I have no idea why one would do rear lowers only

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post #12 of 12 Old 09-11-2018, 09:43 PM Thread Starter
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Quote:
Originally Posted by ExWrench View Post
I did front lowers and rear uppers when I first lifted.

Ran for years like that until I did my rear stretch fookery.

I have no idea why one would do rear lowers only
Yeah I called Dave and he clarified. I already have a set of Teraflex Front adj LCAs, but they're toast. I think I will go with the Synergy adjustable front lowers and adjustable rear uppers for now. Then maybe purchase a fixed rear lower set to help center/push out the rear axle a bit when I go with 37s.

'15 JKU/ 3" Synergy MFG Stage 2/ Fox 2.0 Performance Series IFP/ 35" KM2/ 4.56 Yukon Gears/ Currie Rock Jock 44/ ARB Locker/ Adams 1310/ VKS Fab/ Evo MFG
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