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Cylinder Assist® Axle Kit – Jeep Wrangler JL/JT (2018+) w/ RockJock 4x4 Axle

Cylinder Assist® Axle Kit – Jeep Wrangler JL/JT (2018+) w/ RockJock 4x4 Axle

$530.00
$530.00
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Part Number: CAK691-RJ

This RockJock 4x4 Cylinder Assist® Axle Kit is designed for 2018-2023 Jeep JL and JT applications equipped with RockJock Dana 60-based axle assemblies. Engineered to work with RockJock axle configurations, the kit provides the components required to add Cylinder Assist® steering support for larger tires and demanding off-road use.

The system utilizes a single-ended assist cylinder with stroke limited to 7.375" and features weld-on mounting components designed for proper fitment and durability. A matched hose kit is included to provide the plumbing components required for installation and system integration.

Designed to work as a complete package, the components are selected for compatibility, steering performance, and reliability in severe-duty off-road environments.

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About:About:

Why you’ll love it

  • Takes stress off your steering box and front-end components
  • Helps control larger tires with less effort
  • RockJock-exclusive specs for Dana 60–based axle setups—engineered to match their geometry and components exactly
  • Weld-on setup keeps everything solid under load
  • Matched hose kit included to simplify install
  • Stroke is dialed in for proper JL/JT steering geometry—specifically designed for RockJock D60-based axles requiring a 7.375" cylinder stroke

Tech InfoTech Info

Heads‑up for installers

  • Weld-on kit requires proper placement and fit-up before final welding
  • Make sure steering stops are set correctly to match cylinder stroke
  • Professional install recommended if you’re not used to assist setups

Fitment

  • 2018–2023 Jeep Wrangler JL (with RockJock Dana 60–based axle requiring 7.375" cylinder stroke)
  • 2020–2023 Jeep Gladiator JT (with RockJock Dana 60–based axle requiring 7.375" cylinder stroke)

Use it with

  • PSC power steering pump kits
  • PSC fluid coolers and reservoirs
  • Upgraded steering gearboxes

Specs

  • Cylinder Type: Single-ended
  • Bore: 1.5"
  • Stroke: 8" (limited to 7.375")
  • Rod Diameter: 0.625"
  • Mount Style: Weld-on

What’s included

  • RockJock 4x4 steering cylinder (SC2200K-RJ)
  • Cylinder assist hose kit (HK2036)
  • Weld-on mounting components
California Prop 65 Warning

California Prop 65 Warning

This product can expose you to chemicals including lead and di (2-ethylhexyl) phthalate, which are known to the State of California to cause cancer, birth defects or other reproductive harm.

For more information, go to www.P65Warnings.ca.gov