Product Description
The PSC SGX042SR Cylinder Assist Steering Gearbox is engineered to deliver extreme steering strength and precision for classic GM trucks running crossover steering and hydraulic assist systems. Designed specifically for 1968-1976 GM 4WD trucks and SUVs, this upgraded SGX Series gearbox is built to handle the stress of oversized tires, locking differentials, and hardcore off-road terrain while maintaining smooth, predictable steering control. PSC designed the SGX Series gearboxes with one of the largest piston assemblies available, increasing steering torque output and dramatically improving steering response under load. A heavy-duty 45mm sector shaft bearing reduces flex and premature wear, while billet aluminum covers add corrosion resistance and long-term durability. Every SGX steering box is equipped with -6AN assist ports so you can easily add a PSC hydraulic assist cylinder for extreme steering applications such as rock crawling, lifted trucks, or high-traction off-road builds. This makes the SGX042SR one of the most capable steering upgrades available for classic GM trucks and SUVs. Whether you're building a daily driven restoration, a trail rig, or a full rock crawler, the PSC SGX042SR steering gearbox delivers the strength and reliability serious off-road drivers demand.
Key Features
- Designed for hydraulic assist steering systems
- Largest piston assembly in its class for increased steering torque
- Heavy duty 45mm sector shaft bearing for improved durability
- Billet aluminum top and end covers resist corrosion
- -6AN assist ports for PSC steering assist cylinder integration
- Variable turning ratio for improved steering control
- Remanufactured and upgraded for maximum efficiency
- Heavy-duty design for oversized tires and off-road use
- Built for classic GM crossover steering conversions
Vehicle Fitment
- 1968 Chevrolet K10 / K20 / K30 4WD Pickup
- 1969 Chevrolet K10 / K20 / K30 4WD Pickup
- 1970 Chevrolet K10 / K20 / K30 4WD Pickup
- 1971 Chevrolet K10 / K20 / K30 4WD Pickup
- 1972 Chevrolet K10 / K20 / K30 4WD Pickup
- 1973 Chevrolet K10 / K20 / K30 4WD Pickup
- 1974 Chevrolet K10 / K20 / K30 4WD Pickup
- 1975 Chevrolet K10 / K20 / K30 4WD Pickup
- 1976 Chevrolet K10 / K20 / K30 4WD Pickup
- 1968-1976 GMC K15 / K25 / K35 4WD Trucks
- 1969-1976 Chevrolet Blazer / GMC Jimmy 4WD
- 1968-1976 Chevrolet Suburban / GMC Suburban 4WD
- Vehicles converted to crossover steering systems
Specifications for psc SGX042SR
| Specification | Details |
|---|---|
| Manufacturer | PSC Performance Steering Components |
| Part Number | SGX042SR |
| UPC | 687927186644 |
| GTIN | 00687927186644 |
| Steering Ratio | 13-16:1 Variable Ratio (Approx. 3.3 Turns Lock-to-Lock) |
| Input Shaft | 13/16" – 36 Spline |
| Mounting | 4-Bolt Outside-Frame Mount |
| Assist Ports | Dual -6AN Ports for Hydraulic Assist Cylinder |
| Shipping | Free Shipping |
| California Prop 65 | WARNING: This product can expose you to chemicals known to the State of California to cause cancer and reproductive harm. For more information visit www.P65Warnings.ca.gov. |
Frequently Asked Questions
What is a cylinder assist steering gearbox?
A cylinder assist steering gearbox is designed to work with an external hydraulic steering cylinder. This dramatically increases steering power and reduces steering effort when running oversized tires or extreme off-road setups.
Does the PSC SGX042SR require hydraulic assist?
No. The gearbox can be run without assist, but it includes -6AN ports so a PSC steering assist cylinder can be added later if additional steering power is needed.
What steering setup is this gearbox designed for?
This gearbox is designed specifically for classic GM trucks using crossover steering systems commonly found on lifted or off-road builds.
Will this work with factory steering components?
It is intended for crossover steering conversions and typically requires a compatible pitman arm and steering linkage setup.
