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  • Steering kit featuring PSC 715, PSC pump, pulley, reservoir, steering gear, cylinder, cooler system, hoses, belt, mounts, hardware and clamp.
  • PSC Cylinder Assist® Steering Kit for 2020 and Newer Jeep JL/JT 3.6L with OE Axle & Tie Rod
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BIG BORE XD® Cylinder Assist® Steering Kit – Jeep Wrangler JL/Gladiator JT 3.6L (2020+)

BIG BORE XD® Cylinder Assist® Steering Kit – Jeep Wrangler JL/Gladiator JT 3.6L (2020+)

$3,612.99
$3,612.99
Sale Out of Stock
Shipping calculated at checkout.

Part Number: SK689R36JP3-6.75W-1.25

Axle Type
Axle Stroke
Tie Rod Clamp Size

You’ve lifted your JL or JT, slapped on 37s or bigger, and now your steering feels like a workout — this kit’s your fix.

PSC’s legendary BIG BORE XD Cylinder Assist Steering Kits are built to handle the extra load and torque that come with oversized tires, beefed-up axles, and all the gear you’ve bolted on. Whether you’re aired down and off-roading, towing, or just daily driving and mall crawling, this is a critical upgrade that’ll make your Jeep steer like it should.

We bumped the stock 70mm piston to a beefy 80mm for more torque, and upgraded the sector shaft from 42mm to 45mm to eliminate the all-too-common shear problem. Don’t trust sensors and computers to decide how much pressure you need? Good — this kit includes a belt-driven, mechanical pump that puts you in control.

Every kit comes complete with a steering gear, pump, pre-fab hose assemblies, fluid cooler, PSC’s 715 Power Steering Fluid, and your choice of a Tie Rod Clamp or No-Weld Brackets for unmodified factory axles and tie rods.

Running factory or aftermarket axles? Third-party tie rod? No problem. Just pick the right axle travel length (6.75", 7.5", or 8.0") and clamp size to match your setup — and you’re good to go.

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About:About:

Why you’ll love it

  • Easily turns big tires—no more arm wrestling your Jeep 
  • Mechanical pump = reliable, constant  power without computer control
  • Built tough to ensure minimum maintenance and maximum fun

Heads‑up for installers

  • You’ll need a 46mm socket for the Pitman arm nut.
  • Measure your axle’s actual steering travel before ordering
  • Check the outside diameter of your tie rod to make sure you’re ordering the right clamp.
  • Use pneumatic anaerobic thread sealant to help prevent leaks and keep fittings tight under vibration.

IMPORTANT:

If you’re running a Synergy MFG Track Bar Brace (or similar), you must add the HWK-689-PP Bolt Kit.

Do not use the factory or PSC-supplied 90mm bolts with a brace — it can lead to catastrophic gear case failure.

Also note: the larger XD Steering Gear may not clear some aftermarket track bars.

Ideal for

JL/JT owners running 35”and larger tire sizes, upgraded front axle, and larger diameter tie rods.

Fitment

  • 2021-Up Jeep Wrangler JL 3.6L non-eTorque
  • 2020-Up Jeep Gladiator JT 3.6L

What’s included

  • BIG BORE XD Steering Gear
  • XD Pump Kit
  • Assist Cylinder Kit
  • Tie Rod Clamp
  • Hose assemblies, JIC Adapter Fittings (if applicable), Fluid Cooler, SR-VT Anti-Splash Valve, and PSC Power Steering Fluid
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