Cylinder Assist Steering Gear Box, 1977-79 GM 4WD Truck PSC Performance Steering Components




Product Details

Performance Steering Components is proud to introduce the ALL NEW SGX Series Power Steering Gearboxes for GM trucks and SUVs, two-wheel and four-wheel drive applications. 

Improved design features such as the largest piston assembly available delivers increased torque output and a 45MM sector shaft bearing prevent premature failure and provides smooth, reliable performance in all environments. Billet aluminum Top and End Covers resist corrosion and enhance the appearance of any show-ready vehicle.

All SGX Series Power Steering Gearboxes are equipped with 6AN ports for adding a PSC Steering Assist Cylinder at any time.

From the daily driver to the rock-crawling adventure rig, PSC has the high-performance power steering components you need to make transport a safe, reliable, and enjoyable experience.


1977-1979 Full Size GM 4WD Truck/K5 Blazer


  • Exclusive ALL NEW Component
  • Improved Design for Optimum Efficiency
  • Billet Aluminum Top and End Covers
  • -6AN Male Ports for connection to PSC Steering Assist Cylinder
  • Turning Ratio: 13-16:1 Variable, 3.3 Turns Lock-To-Lock
  • Input Shaft: 3/4 Inch - 30 Spline
  • Port Type: SAE Inverted Flare
  • Mounting: Four (4) Bolt, Outside-the-Frame
  • Pinch Bolt Type Pitman Arm Required

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