Currie Lower Front Control Arm Question

LarryG said:

I have the Currie Adjustable control arms installed and have two questions actually.

First- I have 10 turns left on the threads and would like to extend by another two turns....would that leave sufficient amount in the sleeve?

Second, I will attach a photo of both left and right. As you can see they are cocked. I have recentered them several times but they always end up like this....is this normal? If it is not normal, what do I need to do to align them so they stay aligned?

Thanks View attachment 240547 View attachment 240548

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wayoflife said:

You do realize that you have Johnny Joints on both ends of your control arms, right? In other words, there would be nothing to prevent them from rotating freely and that's a good thing. What you're seeing is totally normal.

Exactly why are you wanting to extend your control arms so far out? Do you have adjustable upper arms installed as well?

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Mtb275 said:

I'm running all Currie arms.

It is Normal for the joints to rotate, they are doing their job.

I called Currie when I installed mine and asked them how far I could extend them. They said you want to leave the same amount of threads (in length) as the diameter of the threaded end.

Does that make sense?


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LarryG said:

Yes, I have adjustable uppers, so I knew I could go that route, but wanted to extend rather than retract if I could. I am still shy of my desired caster setting.

Thanks for the quick response.

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wayoflife said:

Eye to eye, how long are your lower control arms set at now?

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LarryG said:

Both are actually the same, not by plan, but they are: 23 7/16".

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LarryG said:

Both are actually the same, not by plan, but they are: 23 7/16".

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wayoflife said:

Factory front lower control arms measure 22-5/8″ in length center to center. Even with 4" of lift, the most I would set front lower arms is 23". Sounds like you're 7/16" too long as it is and you want to go longer?


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LarryG said:

Well, that is just what someone who doesn't know might do. I'm new at this. In the interest of trying to understand, can you provide why it is that you wouldn't go longer than 23"? I really would like to learn not only what NOT to do, but why. I will certainly shorten the upper to gain additional caster. Although I have adjustable, they are currently at the stock length. I was hoping I could do everything with the lowers. Don't ask me why. Previously I have read you suggest that you could "get by" with only lowers to reach the caster goal, so my thinking was....treat it like I only had lowers....maybe dumb logic, but that is what I thought.

Thanks, as always.

P.S. I do have PR60s, if that makes any difference.

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wayoflife said:

The length of your lower control arms are intended to set the position of your axle while your upper arms should be used to set caster up front and pinion angle in the rear. With 3"-4" of lift, about 23" give or take an 1/8" should put your front axle back at about where it needs to be. Yes, you can "get by" setting your caster with just front lowers but from what I have seen, anything more than 23" will typically give you MORE than +4° of caster. I have also found that arms set longer than 23" can cause unwanted spring bow and rubbing of things like sway bar arms or bump stop cups as a result of it. Having a ProRock 60 should make no difference as to where your axle is located but it would make a difference in how you set your caster being that it should already come with +6° of caster built into it.

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