Product Description
The PSC SK688R38JP1-OE-1.25 Cylinder Assist Steering Kit is a complete high-performance hydraulic steering upgrade designed for 2007-2011 Jeep Wrangler JK and JKU models equipped with the 3.8L engine and OE front axles. Built around PSC’s legendary Big Bore XD steering gear, this kit dramatically improves steering power, control, and durability for vehicles running oversized tires and demanding off-road conditions. Factory steering systems often struggle when larger tires, lockers, and heavy off-road loads are introduced. The PSC SK688R38JP1-OE-1.25 kit addresses these issues with a complete system upgrade including a high-performance pump kit, hydraulic assist cylinder, fluid cooling system, and reinforced steering gear. Together these components provide improved steering torque output, eliminate steering wheel play, and significantly reduce steering effort in extreme conditions. This bolt-on steering assist system includes a 6.75-inch stroke hydraulic assist cylinder and a 1.25-inch tie rod clamp designed for OE axle configurations. The result is a reliable steering system capable of confidently controlling tires larger than 35 inches while maintaining precise handling on both the trail and the road.
Fitment
- 2007 Jeep Wrangler JK 3.8L
- 2008 Jeep Wrangler JK 3.8L
- 2009 Jeep Wrangler JK 3.8L
- 2010 Jeep Wrangler JK 3.8L
- 2011 Jeep Wrangler JK 3.8L
- 2007-2011 Jeep Wrangler Unlimited JKU 3.8L
- Designed for OE front axle configurations
- Recommended for vehicles running 35" tires or larger
Specifications for psc SK688R38JP1-OE-1.25
| Specification | Details |
|---|---|
| Manufacturer | PSC Motorsports |
| Part Number | SK688R38JP1-OE-1.25 |
| UPC | 687927188372 |
| GTIN | 687927188372 |
| Steering Assist Cylinder Stroke | 6.75 Inches |
| Tie Rod Clamp Size | 1.25 Inch Diameter |
| Steering Gear | PSC Big Bore XD Steering Gear |
| Pump System | High Performance Pump with Reservoir and Cooler |
| Installation Style | Bolt-On Cylinder Mount |
| Shipping Info | Free Shipping Available |
| Prop 65 | WARNING: Cancer and Reproductive Harm – https://www.P65Warnings.ca.gov |
Frequently Asked Questions
What does the PSC cylinder assist steering kit do?
This kit adds a hydraulic steering assist cylinder that shares the load with the steering gearbox. It greatly reduces steering effort when turning oversized tires or when driving in technical off-road terrain.
What is included in the PSC SK688R38JP1-OE-1.25 kit?
The kit includes the PSC Big Bore XD steering gearbox, power steering pump kit with reservoir and cooler, hydraulic assist cylinder, hoses, tie rod clamp, mounting brackets, and installation hardware.
Is this kit compatible with stock Jeep JK axles?
Yes. This version of the kit is designed specifically for OE front axle configurations on 2007-2011 Jeep Wrangler JK/JKU models.
What tire sizes benefit from this upgrade?
PSC recommends hydraulic assist steering for vehicles running tires larger than 35 inches or for rigs used heavily off-road with lockers or aftermarket axles.
Why choose PSC steering systems?
PSC Motorsports steering components are trusted across professional rock crawling, desert racing, and extreme off-road builds. Their systems are engineered to deliver superior steering torque, durability, and precision control.
