Product Description
The PSC SK688R38JP1-OE-1.5 Cylinder Assist Steering Kit is a complete high-performance steering upgrade engineered for the 2007-2011 Jeep Wrangler JK and JKU equipped with the 3.8L engine. This bolt-on hydraulic assist system dramatically improves steering power, durability, and control for vehicles running oversized tires, locking differentials, and demanding off-road setups. At the heart of the system is PSC’s BIG BORE XD Steering Gearbox, designed to increase steering torque and eliminate the factory steering weaknesses common in Jeep JK platforms. Paired with a high-performance power steering pump kit, assist cylinder, fluid cooler, and upgraded hose system, this kit delivers smooth steering operation even under extreme loads. Designed for OE axles with a 1.5-inch tie rod, the kit includes a durable tie rod clamp and a powerful 6.75-inch stroke hydraulic assist cylinder. The bolt-on mounting system makes installation straightforward while delivering the strength required for aggressive trail driving and rock crawling. PSC Cylinder Assist steering kits are trusted by off-road enthusiasts worldwide because they improve steering response, reduce pump overheating, and provide the steering power required to turn tires larger than 35 inches with confidence.
Fitment
- 2007 Jeep Wrangler JK 3.8L
- 2008 Jeep Wrangler JK / JKU 3.8L
- 2009 Jeep Wrangler JK / JKU 3.8L
- 2010 Jeep Wrangler JK / JKU 3.8L
- 2011 Jeep Wrangler JK / JKU 3.8L
- Vehicles equipped with OE front axles
- Designed for 1.5 inch tie rod diameter
- Recommended for vehicles running 35"+ tires and heavy off-road setups
Specifications for psc SK688R38JP1-OE-1.5
| Specification | Details |
|---|---|
| Manufacturer | PSC Motorsports |
| Part Number | SK688R38JP1-OE-1.5 |
| UPC | 687927188396 |
| GTIN | 687927188396 |
| Engine Compatibility | 3.8L V6 |
| Vehicle Platform | Jeep Wrangler JK / JKU |
| Tie Rod Clamp Size | 1.5 inch |
| Assist Cylinder Stroke | 6.75 inches |
| Steering Gear | PSC Big Bore XD Steering Gearbox |
| Kit Contents | Steering gearbox, pump kit, cylinder assist, hoses, fittings, tie rod clamp, fluid cooler |
| Shipping Info | Free Shipping Available |
| Prop 65 | WARNING: Cancer and Reproductive Harm – https://www.P65Warnings.ca.gov |
Frequently Asked Questions
What does a cylinder assist steering kit do?
A cylinder assist system adds a hydraulic ram to the steering linkage which dramatically increases steering force and reduces stress on the steering gearbox when running oversized tires.
Is this kit truly bolt-on?
Yes. The PSC SK688R38JP1-OE-1.5 kit is designed as a bolt-on system for Jeep JK models with OE axles and compatible steering geometry.
What tire size is this steering kit designed for?
PSC designed this system for vehicles running tires larger than 35 inches, including aggressive off-road builds with lockers and upgraded axles.
Does the kit include the power steering pump?
Yes. The kit includes a high-performance PSC power steering pump kit with reservoir, hoses, and fittings required for installation.
Why upgrade to PSC Big Bore XD steering?
PSC Big Bore XD steering gearboxes increase steering torque output, reduce steering play, and improve reliability for vehicles used in extreme off-road environments.
