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  • PSC Motorsports SG685 Big Bore Steering Box for Jeep JK Wranglers 2007-2017
  • SG685 Big Bore Steering Box Pitman Arm

PSC Motorsports Big Bore XD Steering Gear Box (Wrangler JK 2007+)

$895.00 (You save $44.75)
10.00 LBS
Calculated at checkout

    Big Bore Steering Gear Box for JK

    The PSC Motorsports Big Bore XD Steering Gear Box is designed to provide your Jeep Wrangler JK with a direct replacement for your 70mm stock piston. This kit uses a larger 80mm piston, giving it more turning torque to turn up to 37" tall tires without the need of cylinder assist. The sector shaft diameter is increased from 35mm to 42mm for a 35% increase in strength. More material was added to the case in all mounting, providing a sturdier base. This is a must-have for anyone running bigger than factory tires.


    • Bolt on upgrade
    • 1 year limited warranty
    • FLUID: GM AC Delco 89021182



    Kit Includes:
    - One (1) steering gear box
    - One (1) drop pitman arm
    - Necessary hardware
    - Installation instructions

    Hose Kit Options:
    For use if you decide to upgrade to a high flow pump.  These will increase flow and prevent fluid from overheating. 

    Jeep Wrangler JK 2 Door (2007-2017)
    Jeep Wrangler JK 4 Door Unlimited (2007-2017)

    Write your own product review

    1. Just what I needed  star rating

      Posted by Rich on 27th Apr 2017

      The install was super easy other than the fact the box has a little weight to it. Make sure you have a friend available to help get it mounted up. Other than that everything lined up as it should and I only needed to adjust the drag link 1/4 turn to center the steering.
      Driving the box made my steering more stable like I found another degree of caster. Steering effort to turn my 37 x 13.5 Nittos was definitely reduced. I locked up the front locker and drove around in some hardpacked dirt at 12psi and though it wasn't a one finger deal even at a stop the steering effort was very reasonable to turn the wheels from lock to lock. Considering I could not do this at all with the stock steering box this is a huge win in my book. This is NOT hydro assist type of power but a very noticable increase over stock.
      So over all.. Fairly easy install, more turning power, more stable steering, stronger more durable box with a significantly larger sector shaft and for a very reasonable price. I strongly recommend the PSC HD steering box.

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