SG840R - BIG BORE XDR Cylinder Assist™ Steering Gearbox for 1988-1998 GM 2500/3500 4WD

Expected time to ship, 7-10 business days
Quick Overview

XDR Cylinder Assist Steering Gearbox for 1988-1998 GM 2500/3500 4WD

Performance Steering Components offers the highest quality power steering gearboxes, pumps, and cylinder assist components for most high-performance power steering applications. Improved component designs ensure superior handling and performance, durability, and reliability for on-the-road, off-the-road, or track.

All PSC power steering components are manufactured from the highest quality materials. From the daily driver to the rock-crawling rig, PSC has the high-performance power steering components you need to make transport a safe, reliable, and enjoyable experience.

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1988-1998 GM 2500/3500 4WD


  • 100 Percent NEW Component

  • Upgraded 45MM Sector Shaft Bearing eliminates sector shaft deflection, delivers smooth steering operation, and extends the service life of the gearbox.

  • 13/16:1 Variable Ratio slightly reduces number of turns lock-to-lock for improved parking lot maneuvering and more stable highway driving.

  • Larger Piston Diameter delivers Increased Torque Output for Upgraded Tire Sizes and Locking Differentials

  • -6AN Male Ports for connection to PSC Steering Assist Cylinder


  • Turning Ratio: 13/16:1, 3.5 Turns Lock-To-Lock
  • Input Shaft: GM DD with 3/4-30 Spline Adapter
  • Port Type: Metric O-Ring
  • Four (4) Slot Pitman Arm Required
  • Mounting: Three (3) Bolt, Inside-the-Frame


More Information
Custom Stock StatusExpected time to ship, 7-10 business days
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