Rock Krawler Suspension Open Tech Line for JK Forum Members

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11-05-2018, 08:29 AM

#871

resharp001

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Quote:

Originally Posted by jsukey

That question might be better suited for Teraflex since you are still running their control arms...I’m assuming. All lift kits are not created equal.

I'd submit that the length of the control arm depends more on the brand of spring than the arm itself. Different manufacturer springs will net various differences in lift. Regardless of brand of arm, the length will be determined by lift height. I have RK springs, but I think I struggled to find their recommended lengths when I installed adjustable arms further down the road. I just used recommend lengths found in the instructions for a different brand spring that commonly nets more lift (like RK springs do) than the stated number. It will get you close enough to start, and then might need to tweak them based on alignment specs.

Quote:

Originally Posted by karls10jk

with adjusting height you're looking at caster changes which an alignment shop can fix with adjustable arms.

Not sure other parts of the country, but around my area this is not included in the basic cost of an alignment. They will do it for an extra charge though. Just be prepared that it could cost more.

If you're handy, you can easily take the alignment specs and tweak the front upper arms a bit shorter or longer to account for raising or lowering your caster once back at home.

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jsukey (11-05-2018)

11-06-2018, 08:19 AM

#872

Rock Krawler Suspension

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Quote:

Originally Posted by Bxjk

How’s it going? I just installed 3.5 rock krawler coils. Changing from 2.5 teraflex.
My question is I have the new coils in and I’m getting that flighty feeling up front at highway speeds. I also have adjustable control arms all around. By any chance do you know what length the control arms should be at top and bottom front and rear for your coil springs. And should I adjust or have my Jeep professionally aligned ? Will they adjust control arms ?
Thanks

Sorry for the delay, all of our techs were at SEMA and just getting back into the office today. What you are describing is typically indicative of low caster. You can find our recommended starting lengths for each lift height in our online instructions HERE starting at page 5.

Adam C

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11-08-2018, 07:42 AM

#873

Bxjk

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Appreciate all the info. You guys are the best

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11-11-2018, 02:57 PM

#874

11BlackJKUR

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Rock krawler 1.5” max travel upgrade to X factor

I have a 1.5” max travel kit and I want to upgrade to a 1.5” X factor and I’d like to slide the axle back the one inch to gain extra clearance on the pinch seam. What would I have to buy to make the upgrade thanks in advance

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11-13-2018, 02:09 PM

#875

Rock Krawler Suspension

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Quote:

Originally Posted by 11BlackJKUR

What generation is the Max Travel you have? In the rear, does yours have upper OR lower arms? Current production includes uppers but, in the past we made it with lowers.

Adam C

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11-14-2018, 12:41 PM

#876

11BlackJKUR

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My kit came with lower rear arms

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11-15-2018, 06:22 AM

#877

Rock Krawler Suspension

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You'd be looking at adding:
Front upper arms RK02020
Rear Upper arms RK02028B
Rear lower arms (if you want that 1" of axle movement rearward) RK02022
Rear spring perches RK03866
Rear Track Bar RK02026B
Rear adjustable sway bar links RK05185

Adam C

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11-15-2018, 06:34 AM

#878

11BlackJKUR

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Wow I thought the rear arms my kit came with were adjustable? I’m assuming the spring perches are weld on?
Can you recommend a place to buy the spring perches I only seen the 3” and the 6”.
thanks

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11-15-2018, 06:44 AM

#879

TheDirtman

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Thats called an "upgradeable" arm. You upgrade to a longer one and throw the other away.
Its due to the inherant design flaw of the the RK short arms and their joint design to fit those arms. You are looking at a lot of jack to save from doing some minor trimming. I would serious look into alternatives vs buying stuff from a company that touts "upgradeable" and then requires you to buy components you already bought.