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RockJock Johnny Joint Billet Aluminum RockNut Rear Upper Control Arm Set for the JT Gladiator 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 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:

  • JT Gladiator – All Models


Kit Includes:

  • Johnny Joint Billet Aluminum Rear Upper Control Arms (Pair)


Adjustment Range:

  • Closed – 15.830 in.
  • Extended – 18.040 in.



  • Factory hardware is retained to attach arms to the axle and the chassis.
  • Arms are fabricated from 1 1/2 in. solid 7075-T6 aluminum bar.
  • RockNuts require a 1 5/8 in. wrench
  • Wrench flats on the arms require a 1 1/4 in. wrench.
  • Adjusters feature 1 in.-14 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-572202-1
  • RockNut (LH Thread): RJ-572202-2
  • Johnny Joint Adjuster End (RH Thread): CE-9113F
  • Johnny Joint Adjuster End (LH Thread): CE-9113F-L
  • Johnny Joint Rebuild Kit: CE-9110RK
  • Johnny Joint Pivot Ball: CE-91102-28
  • Zerk Fitting: CE-1103K21

RJ-152500-101 - JT Rear Upper Johnny Joint Control Arms (Aluminum w/ RockNuts)

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