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XD Cylinder Assist® Steering Gear – Jeep Wrangler JK/JKU (2007–2018)

XD Cylinder Assist® Steering Gear – Jeep Wrangler JK/JKU (2007–2018)

$1,350.00
$1,350.00
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Part Number: SG684R

Steering Gear Orientation
Are you planning on adding Cylinder Assist® Now or in the Future?

If you're running big tires, lockers, or just pushing your Jeep JK/JKU harder than stock, PSC offers two serious upgrades for your steering system: the Cylinder Assist® Steering Gear and the Replacement Gear. Both are engineered for 2007–2018 Jeep Wrangler JK/JKU models and built to handle the demands of off-road abuse and oversized tires.

The Cylinder Assist® Gear is the strongest, most capable bolt-on gear available, designed for those planning to run a full assist system. The Replacement Gear is a heavy-duty, non-assist option for drivers who want improved steering performance without adding hydraulic assist.

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About:About:

Why you’ll love it

• 35% more turning power than stock when paired with a PSC pump kit
• Built-in ports for Cylinder Assist®—no mods needed
• Includes PSC’s proprietary Pitman arm for the larger sector shaft
• Handles tires up to 35" without assist, and even more with it
• Reinforced case and mounting pad for extreme durability

Why You'll Love the Replacement Steering Gear
• Direct bolt-in upgrade for worn-out or underperforming factory gears
• PSC-tuned internals for smoother steering and better road feel
• Ideal for Jeeps with up to 35" tires not running assist
• Compatible with factory-style steering setups

Tech InfoTech Info

Heads‑up for installers

  • Cylinder Assist® Gear requires a high-flow/high-pressure pump (PSC recommends PK38JP1 or PK36JP1)
  • Both gears weigh ~57 lbs—use proper lifting tools or grab a buddy
  • If using a Synergy MFG Track Bar Brace, you’ll need the HWK-688-PP Bolt Kit (110mm)
  • Factory or PSC-supplied bolts may cause case failure with certain aftermarket braces
  • Supplied Pitman arm has no additional drop—some setups may need a drag link flip kit

Fitment

  • Jeep Wrangler JK/JKU
  • Model Years: 2007–2018

Specs

  • Sector Shaft: 45mm
  • Turning Ratio: 16:1
  • Piston Assembly: 80mm
  • Input Shaft: 3/4" – 30 spline
  • Mounting: Reinforced 4-bolt pad
  • Ports: -6AN for Cylinder Assist®
  • Covers: Billet aluminum top and end cap

What’s included

Cylinder Assist® Gear:

  • (1) BIG BORE XD® Cylinder Assist® Steering Gear
  • (1) PSC Proprietary Pitman Arm

Replacement Steering Gear:

  • (1) PSC Replacement Steering Gear (no assist ports)
  • (1) PSC Standard Pitman Arm

(Pump kit, assist cylinder, and bolt kit sold separately)

SupportSupport

Install Instructions

OEM Cross Reference

Direct Replacement for:

  • Mopar 68052897AE
  • Mopar 52126348AE
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