PSC Cylinder Assist™ Steering Kit for 2020 and Newer Jeep Gladiator JT 3.6L with Aftermarket Front Axle 6.75" Lock-To-Lock and 1-5/8 Tie Rod Clamp

Expected time to ship, 2-3 business days
Quick Overview



Upgrades the 70mm stock piston to 80mm, providing more torque to turn larger tires

Enlarges the sector shaft diameter from 42mm to 45mm, increasing the strength

Comes with NEW OE-spec pitman arm and nut to fit larger 45mm sector shaft

Reliable mechanical, belt-driven pump replaces the stock electric pump

All required hoses, fittings, cooler, anti-splash valve & SWEPCO power steering fluid

Ultimate steering stabilizer for daily driving



(SG689R) 18-2023 Jeep JL/JLU BIG BORE XD Cylinder Assist™ Steering Gear (Not Sold Separetely)

Box 2

(PK36JP3) 3.6L Cylinder Assist™ Pump Kit

Box 3

(CAK689R-6.75W) 6.75” Stroke Cylinder Assist™ Axle Kit

Box 4

(TRCL1.625) 1-5/8" Tie Rod Clamp



Add HWK-689-PP And SYN-8869-10 when installing any Synergy MFG Front Track Bar Brace (or similar) with this product.

Using the Factory or the PSC supplied bolts with a Synergy MFG Track Bar Brace could result in steering gearbox case failure.

The larger size of the BIG BORE XD2 Steering Gearbox may prohibit the use of some aftermarket track bars.

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2020 and Newer Jeep JT Gladiator with 3.6L and Most Aftermarket D44, Select D60, and Spicer UD60 Axle


•Eliminates excessive on-center steering wheel "play"
•Eliminates electro-hydraulic pump overheating
•Increased Torque Output turns tire sizes over 35" 
•Improved turning capability when locking differentials are engaged


•Big Bore XD-JT Steering Gear Box
•High Flow Mechanical Pump Conversion Kit
•Jeep JT Reservoir Kit
•Upgraded High Pressure Hose Assembly
•Upgraded Return Line Kit
•Fluid Cooler Kit
•SWEPCO 715 Power Steering Fluid


WARNING! Use HWK-689-PP hardware kit when installing a Synergy MFG Track Bar and Sector Shaft Brace with this product. Using the SHORTER OEM or the standard 100MM bolts supplied with the XD-JT Steering Gearbox could result in steering gearbox case failure.

The larger size of the BIG BORE XD-JT Steering Gearbox may prohibit the use of some aftermarket track bars.

A Tazer JL Programmer (Tazer JL & Tazer JL MINI) will need to be purchased to override the OEM electro-hydraulic pump functions when installing the PSC High Flow Mechanical Pump Conversion Kit 

Positive caster increases align torque, aka the force that straightens the steering wheel when you go forward, which improves straight line stability of the car. Due to the geometry of positive caster this will also increase negative camber gain when turning, which will enable a wider tire contact patch. The caster angle is a major contributor to directional control. An insufficient amount of positive caster angle will decrease driver effort at the steering wheel, but may make the vehicle too sensitive and twitchy, especially as speed increases. To achieve the best on-the-road driving experience, recommended front axle caster setting is 7 degrees positive.

More Information
Custom Stock StatusExpected time to ship, 2-3 business days
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