RockNut JL/JK Rear Lower Billet Aluminum Control Arms Double Adjustable RockJock 4X4

RockJock 4x4 SKU: HWSH_RJ-142602-101


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RockJock's RockNut Billet Aluminum Johnny Joint Rear Lower Control Arm Set for the JL Wrangler and Unlimited and JK Wrangler and Unlimited 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 - and double adjustable arms make this job that much easier because neither end of the arm has to be removed from the vehicle for adjustment!

These arms are CNC machined from 7075-T6 aluminum, feature our patent pending RockNut locking nut technology and our 2 1/2 inch Johnny Joints with massive 1 1/4 inch RH and LH threads!

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
  • JK Wrangler Unlimited (4-door) - All Models
  • JK Wrangler (2-door) - All Models

Kit Includes:

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

Adjustment Range:

  • Closed - 19.350 in.
  • Extended - 21.210 in.


  • Factory hardware is retained to attach arms to the axle and the chassis.
  • Arms are fabricated from 2 in. solid 7075-T6 aluminum bar.
  • RockNuts require a 1 7/8 in. wrench.
  • Wrench flats require a 1 3/4 in. wrench.
  • Adjusters feature 1 1/4 in.-12 RH/LH threads.
  • 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
  • Zerk Fittings: CE-1103K21 and CE-9807RLAZ