PSC Jeep Wrangler JK 3.6L Adventure Steering Kit 2012-2018
SK688R36JP1
The PSC Jeep Wrangler JK 3.6L Adventure Steering Kit 2012-2018 pairs a Big Bore XD steering gear with a matched high-performance pump system for 2012–2018 Wrangler JK and JKU 3.6L builds. It is aimed at Jeeps running 35-inch or larger tires that need more steering authority on rocks, tight trails, and obstacles while retaining a conventional steering-gear layout.
The SG688R gear and PK36JP1 pump package bring the gearbox, hydraulic supply, remote reservoir, cooling, and plumbing together. This is useful when the steering upgrade needs to address both the gear and its fluid supply rather than replacing a pump alone. The larger gearbox requires clearance checks around track bars and reinforcement braces, and PSC specifies the complete matched system for warranty coverage. A separate assist cylinder is not listed among the two main included assemblies.
Includes:
- SG688R Big Bore XD steering gear
- PK36JP1 high-performance pump kit
- Pump-kit reservoir, cooler, anti-splash valve, belt, brackets, hoses, and fittings
- 4 quarts PSC 715 fluid
Specifications
| Manufacturer | PSC Motorsports |
|---|---|
| Part number(s) | SK688R36JP1 |
| Steering gear | Big Bore XD Cylinder Assist |
| Pump kit | PK36JP1 |
| Cylinder / assist ram | Not listed as included |
| Product Type | Steering Gear and Pump Kit |
| Primary Application | JK/JKU builds on 35-inch or larger tires; Technical trails and rock crawling; Matched steering gear and pump upgrades |
Fitment
| Jeep Wrangler JK / JKU, 2-door or 4-door, 3.6L | 2012-2018 |
|---|
Install the matched PSC system together. HWK-688-PP may be needed with a Synergy track bar brace or similar reinforcement.
Common Applications:
- JK/JKU builds on 35-inch or larger tires
- Technical trails and rock crawling
- Matched steering gear and pump upgrades
Fitment Notes:
- Verify mounting clearances, hose routing, and steering travel with the complete axle and suspension configuration.
- Keep hydraulic hoses clear of exhaust heat, moving components, sharp edges, and pinch points.
- Follow PSC instructions for fluid selection, system preparation, and bleeding before applying steering loads.
FAQs
Do I need different hardware with a track bar brace?
PSC specifies HWK-688-PP hardware when using a Synergy MFG track bar brace or similar reinforcement. Also verify clearance around the larger Big Bore XD gear before installation.
What is this kit designed to be used for?
Pairs a Big Bore XD steering gear with a matched high-performance pump system for 2012–2018 Wrangler JK and JKU 3.6L builds. It is aimed at Jeeps running 35-inch or larger tires that need more steering authority on rocks, tight trails, and obstacles while retaining a conventional steering-gear layout.
What installation checks matter most?
Verify mounting clearances, hose routing, and steering travel with the complete axle and suspension configuration. Keep hydraulic hoses clear of exhaust heat, moving components, sharp edges, and pinch points.
What is included with this SKU?
The Includes section identifies the listed package contents. Where options are offered, choose the matching model year or steering system; do not assume components listed for a different SKU are supplied.
How should the hydraulic system be prepared?
Follow PSC’s installation procedure for system flushing, approved fluid, and thorough bleeding. Confirm hose connections and inspect for leaks before loading the steering system.
Is a hydraulic assist cylinder included?
PSC lists SG688R and PK36JP1 as the included main assemblies. A separate assist cylinder is not identified in that list.