Steering Gear – GM Vehicles (1980+)
Steering Gear – GM Vehicles (1980+)
Part Number: SG255
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If you’re building a GM truck or car from the 1980s or newer and want your steering to feel tight, responsive, and modern, PSC’s Pro Touring Series Gear is the upgrade for you. With a 12.7:1 quick ratio, this gear gives you firmer handling and better road feel—perfect for street builds, tow trucks, or anything with aftermarket performance parts.
Choose between a Zinc Plated Casting for corrosion resistance or a Black Painted Casting for a clean, OE-style look. Either way, you’re getting a PSC-built gear with upgraded internals, billet components, and a direct bolt-in fit for GM vehicles with a 3/4-30 spline input shaft.

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About:
Why you’ll love it
- Quick ratio steering – less arm work, more control
- Upgraded torsion bar – firmer handling, better feedback
- Billet top cover and end plate – built to last
- Two finish options – zinc plated or black painted
Tech Info
Heads‑up for installers
- This gear fits GM vehicles with a 3/4-30 spline input shaft and metric O-ring ports. Double-check that your hoses match before you start the install.
- If you’re running oversized tires or towing heavy, pair it with a PSC high-performance pump and remote reservoir for the best results.
- And don’t forget—flush your system before installing new parts to keep everything running smooth.
Fitment
- GM Vehicles (1980 & newer)
- 3/4-30 Spline Input Shaft
- Metric O-Ring Ports
- Factory-style power steering systems
Use it with
- PSC high-performance pumps
- PSC remote reservoirs
- Ideal for street, towing, and light off-road use
Ideal for
- Aftermarket builds with performance upgrades
- Street-driven trucks and cars
- Drivers who want modern steering feel and quick response
Specs
- Steering Ratio: 12.7:1 Quick Ratio
- Input Shaft: 3/4-30 spline
- Ports: Metric O-Ring
- Torsion Bar: Upgraded for firm handling
- Top Cover & End Plate: Billet aluminum
- Casting Finish Options:
Zinc Plated (corrosion-resistant)
Black Painted (OE-style appearance)
What’s included
Pro Touring Series Steering Gear (choose your finish)
California Prop 65 Warning
This product can expose you to chemicals including lead and di (2-ethylhexyl) phthalate, which are known to the State of California to cause cancer, birth defects or other reproductive harm.
For more information, go to www.P65Warnings.ca.gov