Adjustable Control Arms -
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Unread 04-29-2010, 08:49 AM   #1
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2010 JK Wrangler 
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Adjustable Control Arms

I'm looking at lift kits, and trying to decide which that I want.

One of the differences between my top two choices right now is Adjustable Control Arms.

Anyone have a few moments to give a brief overview on what is gained by the adjustable control arms over 'regular' ones?

The lift kits I'm debating are:

Clayton 3.5"

Teraflex 3"

Last edited by NaeKid; 04-29-2010 at 12:29 PM.. Reason: Moderator: Approved post
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Unread 04-29-2010, 01:38 PM   #2
mclaggan123's Avatar
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the adjustable control arms will allow you to adjust the caster. im not sure what else they will allow but there worth it.

2006 Rubicon unlimited, silver. 5.5" long arm lift. 35" BFG KM2's on 15" black steelies. skidrow steering skid and radiator skid . LOD rear bumper with tire carrier. Flowmaster 44 exhaust. .CB with tuffy Overhead storage . Offroad lights in bumpers front and rear plus 2 more on the winch hoop.
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Unread 04-29-2010, 01:57 PM   #3
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I have the TF 3" lift and netted well over 3". Without adjustable lower control arms the castor was 1*, once changed to 5* the ride is as different as night and day.

I did however just order the AEV control arm brackets which solve the castor problem along with drive line angle.

Just my thoughts.

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Unread 04-29-2010, 02:52 PM   #4
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after a bit of more skillful reading, i realize both the lifts have adjustable arms.

so, the question i probably should have really asked.

for off and on road use, what does caster and pinion type angle adjustments actually do?
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Unread 04-29-2010, 06:22 PM   #5
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Well.....they adjust your caster and pinion angles. You should be concerned about caster angle in the front, which is the angle between a straight line between the king pins and the level road, this is usually tilted with the top slightly behind the bottom king pin giving the wheel "trail." That is, the contact point of the tire is behind or trailing the intercept point of that straight line between the kingpins and the road....this is what causes the wheel to "self center" so to speak and be stable - look it up on google for fancy pictures, etc.
In the rear, the pinion angle is the relative angle of the pinion/yoke and the joint on the rear of the transfer case. Depending upon lift and joint type (Rzeppa or CV) the best pinion angle will vary. With a lift of up to about 3 inches on a 2dr, not much to worry about with stock Rzeppa joints - but over that much lift, one has to be more concerned as the joint angle becomes excessive and can tear or rip the rubber boot. Search is your friend on this...many good posts that go into detail. Just 2.5 cents in this case.
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Unread 04-29-2010, 09:11 PM   #6
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found this:

Toe, Caster and Camber

pretty thorough for what the effects of everything is.
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clayton lift , lift kits , teraflex lift
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