top of page

The RockJock Johnny Joint Billet Aluminum RockNut Front Lower Control Arm Set for JL Wrangler, JL Unlimited and JT Gladiator vehicles provides you with extremely heavy duty, adjustable length control arms to replace your factory control arms. Adjustable control arms are a must for aligning lifted vehicles to get your pinion angle specs. in check! 
These arms are CNC machined from 7075-T6 aluminum, feature our patent pending RockNut locking nut technology and our 2 1/2 in. Johnny Joints with massive 1 1/4 in. RH/LH threads! 
Johnny Joints, the original and most durable high-articulation urethane suspension joint on the market, feature a smooth steel ball that pivots inside a proprietary urethane shell to provide over 30 degrees (per joint) of quiet, shock dampening articulation - without the excessive deflection found in soft rubber-based flex joints. Johnny Joints deliver a smooth, comfortable on-road ride with the ultimate in off-road capability. They are so trusted, that they are used by multiple commercial suspension companies, for both street and off-road suspension systems. Learn more here.
Arms are fully greasable, fully adjustable and feature machined-in wrench flats. Finished in clear anodize on the arms and gold zinc plating on the Johnny Joint ends.


Kit Fits:

  • JL Wrangler Unlimited (4-door) – All Models
  • JL Wrangler (2-door) – All Models
  • JT Gladiator – All Models


Kit Includes:

  • Johnny Joint Billet Aluminum Front Lower Control Arms (Pair)


Adjustment Range:

  • Closed – 23.970 in.
  • Extended – 25.830 in.



  • IMPORTANT: these arms are ONLY for use with 70 in. wide (or wider) axles!
  • Factory hardware is retained to attach arms to the axle and the chassis.
  • No provisions are provided for reattaching the factory brake line anchoring brackets to the new arms.
  • Arms are fabricated from 2 in. solid 7075-T6 aluminum bar.
  • RockNuts require a 1 7/8 in. wrench.
  • Wrench flats on the arms require a 1 3/4 in. wrench.
  • Adjusters feature 1 1/4 in.-12 RH/LH threads.
  • Johnny Joints require non-synthetic, hi-moly lube grease such as our CE-9013G
  • Applicable Johnny Joint Tool for these Control Arms: CE-9110T


Parts List:

  • RockNut (RH Thread): RJ-572200-1
  • RockNut (LH Thread): RJ-572200-2
  • Johnny Joint Adjuster End (RH Thread): CE-9114F
  • Johnny Joint Adjuster End (LH Thread): CE-9114F-L
  • Johnny Joint Rebuild Kit: CE-9110RK
  • Johnny Joint Pivot Ball: CE-91102-28
  • Zerk Fitting: CE-1095K47

RJ-142302-101 - JL/JT Front Lower Johnny Joint Control Arms Aluminum w/RockNuts

    bottom of page