Lower/upper control arm lengths for 2.5" lift on a 2-door?
01-19-2011, 06:25 PM
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JK Freak
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Lower/upper control arm lengths for 2.5" lift on a 2-door?
Does anyone know what the proper lengths are for both upper and lower control arms on a 2.5" on a 2-door? And does anyone know what the correct pinion angle should be for the front and rear driveshafts?
01-21-2011, 07:56 PM
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JK Freak
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For the front, its a different story. Its a compromise of pinion angle vs camber for alignment. Teraflex has a chart on their website that is a good starting point. I do not remember off hand what they are though.
01-21-2011, 08:11 PM
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I would also like to know what length to adjust the Teraflex lower control arms to correct the negitive caster, as result of the lift. I diden't notice the effect of the negitive caster when I was running the stock tires, when I installed the 35s i could feel the wandering at higher speeds. When I talked to Treaflex they said It would help the issue.
01-21-2011, 10:54 PM
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I would also like to know what length to adjust the Teraflex lower control arms to correct the negitive caster, as result of the lift. I diden't notice the effect of the negitive caster when I was running the stock tires, when I installed the 35s i could feel the wandering at higher speeds. When I talked to Treaflex they said It would help the issue.
From the FAQ's:
Q: What is Caster? How much do I need?
A: Caster is the angle upon which your front axle sits at in order to help keep your Jeep driving straight. Positive caster, which is what you want, will cause your axle to sit in a way that your pinion shaft will be dipping ever so slightly towards the ground. Too little or even negative caster angle can cause your Jeep to wander and feel 'flighty' or 'darty' as I've heard some people call it. From the factory, your JK will have +4.2° of caster and if you lift it and install larger tires, you will need to increase this amount to help compensate for the modifications. At 3"-4" of lift, I have found that +6°~8° of caster will do wonders to help improve the handling of your Jeep JK Wrangler.
A: Caster is the angle upon which your front axle sits at in order to help keep your Jeep driving straight. Positive caster, which is what you want, will cause your axle to sit in a way that your pinion shaft will be dipping ever so slightly towards the ground. Too little or even negative caster angle can cause your Jeep to wander and feel 'flighty' or 'darty' as I've heard some people call it. From the factory, your JK will have +4.2° of caster and if you lift it and install larger tires, you will need to increase this amount to help compensate for the modifications. At 3"-4" of lift, I have found that +6°~8° of caster will do wonders to help improve the handling of your Jeep JK Wrangler.
From the Write-ups area:
http://project-jk.com/jeep-jk-write-...-end-alignment
01-21-2011, 11:53 PM
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Originally Posted by Loadbreak
Teraflex has a chart on their website that is a good starting point. I do not remember off hand what they are though.
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01-22-2011, 08:30 AM
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Actually it is not. That is how I initially set mine, but I decided to shorten the Front Lowers from their spec for my application. I also said its a good starting point, not the bible.
See link below. You will have to click on the .pdf dowload once there.
http://www.teraflex.biz/jk-wrangler-...rms.html#third
See link below. You will have to click on the .pdf dowload once there.
http://www.teraflex.biz/jk-wrangler-...rms.html#third
Last edited by Loadbreak; 01-22-2011 at 08:32 AM.
01-22-2011, 10:48 AM
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Front Lower CA length
Thanks for the response. I am in the process of making a set of control arms for my unit and wanted to make sure the Tera Flex lengths were good as mine will be welded and not adjustable.