SG688 - Big Bore XD Steering Gearbox for 2007-2018 Jeep JK

Expected time to ship, 7-10 business days
SKU
SG688
$1,099.99
Quick Overview

The BIG BORE XD is the most powerful and strongest replacement steering gearbox on the market for the Jeep JK. Any Jeep JK with larger tires and/or locking front differential needs this bolt-on upgrade. The BIG BORE XD, when combined with our XD Pump Kit, provides up to 35% more turning power over the OEM steering gearbox.  


The sector shaft diameter has been increased from 35MM to 45MM to handle the extra torque output and prevent shear in extreme duty environments. Every Big Bore XD Steering Gearbox includes a NEW proprietary Pitman arm designed for the larger sector shaft.  


Improved on-the-road driving characteristics and significantly increased torque output are achieved by using a 16:1 85MM piston assembly. This increased torque output will turn tire sizes up to 35" without the installation of cylinder assist, and will enable you to enjoy superb on-the-road handling as well as tackle 1-4 rated trails with ease.


PRODUCT FEATURES:

  • 45MM Sector Shaft
  • NEW XD proprietary Pitman arm
  • 16:1 Ratio 80MM Piston Assembly
  • Reinforced mounting pad and case


WARNING!

Add HWK-688-PP hardware kit 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 XD Steering Gearbox may prohibit the use of some aftermarket track bars.


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APPLICATION:

2007-2018 Jeep JK

NOTES:

The supplied Pitman arm does not have any additional drop to it, therefore some applications may require a drag link flip kit.

The mounting pad of the BIG BORE XD has been up significantly reinforced to reduce frame flex, unwanted sector shaft deflection, and to prevent catastrophic failure of the case, resulting in a steering gearbox that weighs 15 LBS heavier than the OEM component.

WARNING!

Add HWK-688-PP hardware kit 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 XD Steering Gearbox may prohibit the use of some aftermarket track bars.

RECOMMENDED INSTALLATION NOTES:

The BIG BORE XD Steering Gearbox was designed to be used with a power steering pump capable of 1800 PSI.

PSC highly recommends the use of their HIGH FLOW/HIGH-PRESSURE Pump Kits to ensure system efficiency and extend component life. These pumps operate at approximately 1800 PSI and produce 50% more volume than the OEM pump. Vehicle steering performance will be diminished if a high mileage or remanufactured component is used.  

Pitman Arm Retaining Nut Size: 46MM

HEMI Engine Conversions: If the AC compressor or power steering pump is located on the bottom driver side of the engine, there may be clearance issues.

GM LS3 Engine Conversions: The alternator will need to be modified for clearance.

Review Of Big Bore XD Featured on Fourwheeler Network

 

More Information
Product TypeSteering Gear
WarningCancer and Reproductive Harm www.P65Warnings.ca.gov
Custom Stock StatusExpected time to ship, 7-10 business days
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