RockJock’s Johnny Joint Billet Aluminum RockNut Rear Control Arm Set for all 2021-up Broncos 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 our double adjustable design allows you to easily adjust the length of the arms without removing either end from the vehicle!
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, black zinc plating on the RockNuts and gold zinc plating on the Johnny Joint ends.
- 2021-up Bronco – All Models
- Johnny Joint Billet Aluminum Rear Upper Control Arms (pair)
- Johnny Joint Billet Aluminum Rear Lower Control Arms (pair)
- Upper arms are fabricated from 1 5/8 in. solid 7075-T6 aluminum bar.
- Upper Arm RockNuts require a 1 3/4 in. wrench
- Upper Arm wrench flats require a 1 1/2 in. wrench.
- Lower arms are fabricated from 2 in. solid 7075-T6 aluminum bar.
- Lower Arm RockNuts require a 1 7/8 in. wrench
- Lower Arm wrench flats 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
- RockNut (upper arm, RH thread): RJ-572201-1
- RockNut (upper arm, LH thread): RJ-572201-2
- RockNut (lower arm, RH thread): RJ-572201-1
- RockNut (lower arm, LH thread): RJ-572201-2
- Johnny Joint Adjuster End Forging (RH thread): CE-9114F
- Johnny Joint Adjuster End Forging (LH Thread): CE-9114F-L
- Johnny Joint Rebuild Kit: CE-9110RK
- Johnny Joint Pivot Ball (frame side): RJ-348004-1
- Johnny Joint Pivot Ball (axle side): RJ-348004-3
- Zerk Fitting: CE-1103K21