PSC Jeep Wrangler YJ 4.0L Power Steering Pump Kit 1991-1995
PK40JP1
The PSC Jeep Wrangler YJ 4.0L Power Steering Pump Kit 1991-1995 upgrades the hydraulic supply on 1991–1995 Wrangler YJ 4.0L builds used for trail riding, larger tires, and repeated steering loads. It is a practical system upgrade for a Jeep whose factory pump struggles under trail use, combining a performance pump with remote fluid storage and dedicated cooling.
The two year-specific packages use different pumps: PK40JP1 covers 1991–1994, while PK40JP1-2 covers the distinct 1995 accessory configuration. Both include a remote reservoir, anti-splash valve, CK217 dual-pass heat-sink cooler, reservoir feed hose, mounting components, and PSC 715 fluid. Choose by the actual engine accessory arrangement as well as model year, and retain a compatible steering gearbox or assist system; these packages do not supply a complete full hydraulic conversion.
Includes (Dependent on Customer Selection):
PK40JP1:
High‑Performance Power Steering Pump Kit – Jeep Wrangler YJ
4.0L (1991–1994)
Standard hydraulic steering systems
Included Components:
- SP43362SJP – High‑Flow Power Steering Pump for Jeep 4.0L
- SR146 – Remote Reservoir, 8.25" OAH, Brushed Aluminum
- SRK‑6‑12‑P – Remote Reservoir Fitting Kit, ‑6 AN / ‑12 AN AUX Plug
- SR‑VT – Anti‑Splash Pressure Relief Valve
- CK217 – Heat Sink Cooler Kit, Jeep Wrangler YJ (1990–1995), Dual Pass
- HA‑L138 – Feed Hose Assembly, Reservoir to Pump
- MR20K – Remote Reservoir Mount
- PSC 715 Power Steering Fluid, 4‑Quart Pack
PK40JP1‑2:
High‑Performance Power Steering Pump Kit – Jeep Wrangler YJ
4.0L (1995)
Standard hydraulic steering systems
Included Components:
- SP33362SJP – Jeep 4.0L High‑Flow Power Steering Pump (TJ/LJ/XJ‑style)
- SR146 – Remote Reservoir, 8.25" OAH, Brushed Aluminum
- SRK‑6‑12‑P – Remote Reservoir Fitting Kit, ‑6 AN / ‑12 AN AUX Plug
- SR‑VT – Anti‑Splash Pressure Relief Valve
- CK217 – Heat Sink Cooler Kit, Jeep Wrangler YJ (1990–1995), Dual Pass
- HA‑L138 – Feed Hose Assembly, Reservoir to Pump
- MR20K – Remote Reservoir Mount
- PSC 715 Power Steering Fluid, 4‑Quart Pack
Designed specifically around the 1995 YJ pump configuration,
which differs from earlier model years.
Specifications
| Manufacturer | PSC Motorsports |
|---|---|
| Part number(s) | PK40JP1, PK40JP1-2 |
| PK40JP1 | 1991-1994 YJ 4.0L |
| PK40JP1-2 | 1995 YJ 4.0L |
| System | Standard hydraulic / cylinder assist |
| Vehicle | Model Year | 1991–1994 Jeep Wrangler YJ 4.0L = PK40JP1; 1995 Jeep Wrangler YJ 4.0L = PK40JP1-2 |
| Product Type | Power Steering Pump Kit |
| Primary Application | Trail-driven YJ 4.0L builds; Larger-tire steering upgrades; Replacement of weak or overheating pump systems |
Fitment
| Jeep Wrangler YJ 4.0L, PK40JP1 | 1991-1994 |
|---|---|
| Jeep Wrangler YJ 4.0L, PK40JP1-2 | 1995 |
4.0L gas engine only. Select the pump configuration by model year.
Common Applications:
- Trail-driven YJ 4.0L builds
- Larger-tire steering upgrades
- Replacement of weak or overheating pump systems
Fitment Notes:
- Verify the installed engine accessory drive, pump bracket, pulley alignment, and belt compatibility before final assembly.
- 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
Why are there two YJ pump options?
PK40JP1 uses SP43362SJP for 1991–1994. PK40JP1-2 uses SP33362SJP for the different 1995 pump configuration. Select the package matching the vehicle’s actual accessory drive.
What is this kit designed to be used for?
Upgrades the hydraulic supply on 1991–1995 Wrangler YJ 4.0L builds used for trail riding, larger tires, and repeated steering loads. It is a practical system upgrade for a Jeep whose factory pump struggles under trail use, combining a performance pump with remote fluid storage and dedicated cooling.
What installation checks matter most?
Verify the installed engine accessory drive, pump bracket, pulley alignment, and belt compatibility before final assembly. 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.
Why does steering fluid cooling matter on the trail?
Repeated high-load steering inputs generate heat in the hydraulic circuit. Install the supplied cooler where specified, or plan suitable cooling according to PSC’s recommendations for the complete system.
