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Old 10-14-2018, 07:45 AM
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More alignment number ?'s

2010 jk with 18/59 spring combo. Rides good, steering maybe a little light on highway, good steering wheel return after turning, just always looking to tweak it better. Brackets or arms to increase caster and how much so I don't damage or premature wear anything? I've been around, and searched it to death, so thanks in advance!

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Old 10-14-2018, 07:51 AM   #2
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Adjustable upper AND lower control arms are the preferred and best way to go for dialing in caster angle to the finest degree and drivability. However plenty of folks use the geometry brackets without any issues as well. Depends on your budget

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Old 10-14-2018, 02:32 PM   #3
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I wouldn’t do brackets without a lift since they are designed for a minimum of 2.5” of lift, they will most likely give you too much caster. Synergy and teraflex has fixed length front lower control arms that I want to say are around the same cost as brackets and will help but what you get is what you get. If you really want to dial caster in perfectly your best bet is adjustable lowers but its also the most expensive.
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Old 10-14-2018, 05:09 PM   #4
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I don't like brackets for a spring swap, you don't really have enough lift.

To keep it super simple, put on a set of Synergy fixed front lower control arms. They are plug and play and perfect for a spring swap.
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Old 10-14-2018, 08:42 PM
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What does the jeep come stock with 4 or 5 degrees? What's ideal and where does the drive train vibration come into play?
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Old 10-15-2018, 08:06 PM   #6
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Quote:
Originally Posted by deepbluerubi View Post
What does the jeep come stock with 4 or 5 degrees? What's ideal and where does the drive train vibration come into play?
I want to say 4.2 is the target for stock but it varies. Im running 5.5 on my jk and jku with no vibrations.
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Old 10-15-2018, 11:40 PM   #7
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Vibrations are a combination of caster and height... 6 degrees at 2" of lift? Lots of people with that. 6 degrees on a 4.5" lift? Likely a problem.

I target 5 degrees caster when possible.
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Rugged Ridge XHD
bumper - Yukon Gears - G2 Diff Covers - Pro Comp 8186 - Milestar Patagonia 35's - Teraflex BRK
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Old 12-15-2018, 06:42 AM
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I finally got around to this item, I just ordered the Synergy adjustable front lower control arms. I'm thinking of starting them at 22 7/8", good? With the hope of getting around 4.5-5.0 caster. Should I make the passenger side just a bit longer to help with road crown or is that not viable, worth it? Currently I'm at 3.7 driver side and 3.6 passenger side. I went adjustable, because if I decide to go with a higher true lift in the future than my 18's factory springs up front. Plus, if I get some drive shaft vibration I can always back it down easily. I'm just looking for a little less flightyness on the highway. My jeep rides great, but always an enthusiast, our hobbies die hard.
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Old 12-22-2018, 11:48 AM
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Just to update, I installed the Synergy adjustable s lower fronts this morning, set at 22 7/8". Look like well engineered, quality made and finished pieces. Torqued mounting bolts to 125 lbs, the adjustment lock bolts to 85 lbs with vehicle weight on wheels. Almost didn't do this on my four post lift. Would have been a lot more difficult on the ground. If you want to torque these with jeep on the ground, I suggest a 3/4" torque wrench unless you are built like a Greek God. Also take them both sides off, very easy to rotate axle that way. Rides a bit better, no noises, not sure if I have picked up a little vibration at 80 mph though. Roads here in NY aren't the smoothest. Need to drive a longer shakedown road test. New tires in order for the spring/summer, will have alignment checked then to see where I'm at. I'm figuring caster 4.6 to 5 now.
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Old 01-05-2019, 07:39 PM
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Just an update, these new Synergy arms seem excellent, might be in my head, but smooth, quiet ride, and feels/handles better with a little more caster. As I usually do I weighed my parts. The new synergy adjustable s are 23 lbs and the oem's are 15 lbs. Really solid, well made and so easy to adjust. Finish seems good on them as well, but time will tell. Oh, and no driveshaft vibration even at 80 mph, which I rarely drive that fast anyway.

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