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Thread: Rock Krawler control arm joints

  1. #21
    Nothing but a Thing Benito's Avatar
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    Quote Originally Posted by Ddays View Post
    JJ's won't fit RK arms - the JJ shanks are much larger. I replaced my old mid arms with a couple Currie LCA's last year (and since moved on to an EVO DD LA kit) and took this pic.
    No comparison between the two IMHO

    Attachment 301191
    Currie does make a 2.5” standard width JJ with 1” threads as well, I believe the ones used on their control arms are the larger 1.25” threads. They also have a narrow width 2.5” JJ that has a 7/8” thread. I don’t know what size thread the rock crawler arms use though.

  2. #22
    Caught the Bug enfielded0405's Avatar
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    Dang next year I was thinking RK 2.5” flex with rancho 9ks. Going to keep an eye for threads like this. Hopefully just a bad batch.


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  3. #23
    Addict Ddays's Avatar
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    Quote Originally Posted by Benito View Post
    Currie does make a 2.5” standard width JJ with 1” threads as well, I believe the ones used on their control arms are the larger 1.25” threads. They also have a narrow width 2.5” JJ that has a 7/8” thread. I don’t know what size thread the rock crawler arms use though.
    Good catch - I forgot they made different sizes...

    Quote Originally Posted by enfielded0405 View Post
    Dang next year I was thinking RK 2.5” flex with rancho 9ks. Going to keep an eye for threads like this. Hopefully just a bad batch.
    Having run both I would highly suggest a kit that uses the JJ's like Currie/Clayton/EVO, etc. The RK ends are a real bitch getting the lock nut tightened enough that the ends don't turn on you.
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  4. #24
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    How tight needs the lock nut set? I have a set of LCAs and I wonder how to tighten them. Can't really use a torque wrench. So how to tighten them?
    Please advise. Thanks.

  5. #25
    Caught the Bug Beer&Waffles's Avatar
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    I've had my Max travel for almost two years now. The only issue I've had is the bushing for the front sway bar link is bad and pops out when Im close to full flex. Other then that its a great lift. Rides great and all my control arm bushing are fine. RK does suggest using their grease for the bushing though. Don't know if that might be a contributing factor.

  6. #26
    Addict Ddays's Avatar
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    Quote Originally Posted by jeep670 View Post
    How tight needs the lock nut set? I have a set of LCAs and I wonder how to tighten them. Can't really use a torque wrench. So how to tighten them?
    Please advise. Thanks.
    I used a 24" crescent wrench and had the arms in a vise. A member on here made a slick jig that held the arm instead of a vise. Might try searching for that thread. Torque value for the lock nut is in their instructions - I don't remember what it is.
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  7. #27
    Been Around the Block
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    Remember use anti-seize inside the control arms.

    TORQUE VALUES FOR HARDWARE AND JAM NUTS
    • All 14mm and 9/16” bolts are torqued to 90-100 ft-lbs.
    • All 12mm and ½” bolts are torqued to 75-80 ft-lbs.
    • All 10mm and 3/8 bolts are torqued to 30-35 ft-lbs.
    • All #10-32 bolts are torqued to 25 to 30 inch pounds
    • All 7/8” Jam Nuts are to be torqued 200-220 ft-lbs. Up to ½” of threads showing past the
    jam nut is safe for final adjustment. These specifications are critical for the overall
    longevity of the threaded section.
    • All 1” Jam Nuts are to be torqued to 250-300 ft-lbs. GET YOUR BIG BOY PANTS ON!
    Up to 5/8” of threads showing past the jam nut is safe for final adjustment. These
    specifications are critical for the overall longevity of the threaded section.

  8. #28
    Old Timer TrainWreck618's Avatar
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    I really didn't like my 3.5" mid arm kit, especially the joints. They sucked..


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  9. #29
    Knows a Thing or Two Clearskies's Avatar
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    I've got the 3.5 x factor as well, probably 15k miles and lots of hard trails (John Bull, Holcomb, Cougar Buttes, Dishpan, Calico) and very happy....so far

  10. #30
    Caught the Bug
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    Yeah I started looking at the double D. Problem is this RK kits hasn't seen as much use as I'd have liked before upgrading. But like everyone else I want long arm so who knows might just be the time to do it. The pic comparison defently does Evo justice.

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