Synergy UCA - Rear pinion angle

RockinAZJK said:

Recently installed a 1350 u joint rear DS and have been running stock rear arms with 4” EVO Plush Rides. With the new drive shaft I needed to rotate my rear axle up to match pinion and DS angle.
I just installed some Synergy rear UCA’s and now it looks like I need less pinion angle. Catch is that I believe the arms are adjusted all the way in.

Does anyone have experience with these arms? Are they too long to use with stock lowers or is something wonky with my setup?

Pic is of the DS v pinion angle with the new arms. About 2* too high on pinion
View attachment 338573


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fiend said:

Assuming you have the uppers set as short as they’ll go, consider getting either adjustable lower arms or synergy fixed arms, which are 1/2” longer than stock, cheaper than the adjustables, and should correct your issue. I have the adjustable uppers, fixed lowers, and 4.5” springs. All synergy. Can set the pinion properly with that set up.


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RockinAZJK said:

I was hoping somebody would tell me I was just doing something weird so I wouldn’t have to buy more parts lol


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JKbrick said:

Ha ha ha ha ha ha ha ha , not have to buy more parts, that’s great!!


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WJCO said:

Shorter uppers or longer lowers are the only way to fix your angle.

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fiend said:

Sorry.

Also, that driveshaft looks a bit short to my eye.


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RockinAZJK said:

I sure hope it isn’t. Ordered it from Adams with dimensions and lift specs.


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fiend said:

Put it on stands, take the wheels off, and let the axle fully droop. If the shaft separates, you’ll know it’s too short. [emoji23]


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desertrunner said:

Not sure about the synergy arms but I'm running Currie uppers with stock lowers and it works out with my Adams DS but I am 1.5-2" lower than your lift so it's possible the height is just too much to have only adjustable uppers.
Side note when I ordered my Adams they mentioned how much blue should be showing (can't remember off the top of my head) but mine only have maybe 1" of blue showing at ride height. Might be worth giving them a call and asking about that. Assuming you are at ride height in that picture I agree it looks a bit short

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