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PSC – BIG BORE XD-JT Adventure Steering Kit for 2020+ Jeep JT Gladiator 3.6L – SK551


This kit is the perfect solution for the daily driver JT that also likes to play off-the-road.

SKU: SK689R36JP3 Categories: , Tags: ,

Application: 2020 and Newer Jeep JT Gladiator with 3.6L

PSC has developed the BIG BORE XD-JL Adventure Steering Kits to be the ultimate steering upgrade package for Jeep JLs equipped with locking differentials, aftermarket axles, and up to 35″ tire sizes.

All kits include top of the line components including the BIG BORE XD-JT Steering Gearbox, High-Performance Power Steering Pump Kit with Remote Reservoir, Master Hose Kit, Fluid Cooler, and SWEPCO 715 Power Steering Fluid.


  • Eliminates excessive on-center steering wheel “play”
  • Eliminates electro-hydraulic pump overheating
  • Increased Torque Output turns up to 35″ tire sizes without cylinder assist
  • Improved turning capability when locking differentials are engaged

Every PSC BIG BORE XD Adventure and Cylinder Assist Steering Kit is complete with everything needed for a successful installation.


  • Big Bore XD-JT Steering Gear Box with Cylinder Assist Ports
  • High Flow Conventional PS Pump Conversion Kit
  • Jeep JT Reservoir Kit
  • Master Hose Assembly 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-JL 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.

Note: Images are for illustration purposes only. Images MAY NOT represent the product listed. Please contact Customer Service with any questions or concerns: 928-227-2026.

Weight 103 lbs
Dimensions 12 × 17 × 21 in


Jeep Type