PSC Big Bore XD -JK Cylinder Assist™ Steering Gear for 07-18 Jeep Wrangler JK, JKU SG688R
SKU
PSC-SG688R
We Price Match
- Part: Steering - Boxes, Parts & Seals Steering - Upgrades
- Manufacturer: PSC Steering
The stock JK steering box? It’s fine for stock tires and errands. But throw on 37s, a locker, and a weekend in Moab, and that thing’s begging for mercy (requires Full Hydraulic Power Steering Pump Kit). The BIG BORE XD is the fix—built with a beefy 45mm sector shaft and a reinforced case so it won’t twist, crack, or cry when you crank it hard.
* Requires PSC Pump Kit
* Requires Full Hydraulic Power Steering Pump Kit for 37" + tires.
* Requires PSC Pump Kit
* Requires Full Hydraulic Power Steering Pump Kit for 37" + tires.
Special Price $1,476.41 Regular Price $1,736.95
PSC Steering SG688R
The BIG BORE XD2 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 XD2, 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 XD2 Steering Gearbox includes a NEW proprietary Pitman arm designed for the larger sector shaft.
Improved on-the-road driving characteristics are achieved by using a 16:1 ratio 85MM piston assembly. Also, the much larger 85MM piston assembly delivers significantly increased torque output. This increased torque output will turn up to 35" tall tires without the installation of cylinder assist.
Features:
45MM Sector Shaft
NEW proprietary Pitman arm
16:1 Ratio 85MM Piston Assembly
Reinforced mounting pad and case
Additional Fluid Ports for adding cylinder assist for 37" plus tires.
NOTE: The supplied Pitman arm does not have any additional drop to it, therefore some applications may require a drag link flip
The mounting pad of the BIG BORE XD2 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 PSC-HWK-688-PP hardware kit when installing any Synergy MFG Front Track Bar Brace (or similar) with this product.
RECOMMENDED INSTALLATION NOTES:
The BIG BORE XD2 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.
The BIG BORE XD2 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 XD2, 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 XD2 Steering Gearbox includes a NEW proprietary Pitman arm designed for the larger sector shaft.
Improved on-the-road driving characteristics are achieved by using a 16:1 ratio 85MM piston assembly. Also, the much larger 85MM piston assembly delivers significantly increased torque output. This increased torque output will turn up to 35" tall tires without the installation of cylinder assist.
Features:
45MM Sector Shaft
NEW proprietary Pitman arm
16:1 Ratio 85MM Piston Assembly
Reinforced mounting pad and case
Additional Fluid Ports for adding cylinder assist for 37" plus tires.
NOTE: The supplied Pitman arm does not have any additional drop to it, therefore some applications may require a drag link flip
The mounting pad of the BIG BORE XD2 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 PSC-HWK-688-PP hardware kit when installing any Synergy MFG Front Track Bar Brace (or similar) with this product.
RECOMMENDED INSTALLATION NOTES:
The BIG BORE XD2 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.
Fitment:
07-18 Jeep Wrangler JK07-18 Jeep Wrangler JK Unlimited
| Searchable Sku | SG688R |
|---|---|
| Bulk Item Surcharge | $0.00 |
| Manufacturer | PSC Steering |
Write Your Own Review
