PSC PERFORMANCE BIG BORE XD® Steering Box. If you’re running a RAM 2500 or 3500 and your steering’s gotten sloppy, vague, or just plain worn out—PSC’s BIG BORE XD Steering Gear is the upgrade you need. This thing’s built like a tank and designed to handle the kind of abuse that makes stock steering gears tap out.

The SG856 gear features a massive 45mm sector shaft and a larger lower support bearing, which all but eliminates side-to-side movement. That means tighter steering, better control, and no need for aftermarket steering braces. Inside, an 80mm piston assembly and 16:1 steering ratio deliver smooth, confident handling with about 3.5 turns lock-to-lock.

Whether you’re towing, off-roading, or just want your truck to feel solid again, this gear’s ready to work.

Steering Gear Model: SG856
Sector Shaft Diameter: 45mm
Internal Piston: 80mm
Steering Ratio: 16:1 (approx. 3.5 turns lock-to-lock)
Ports: Compatible with OEM high-pressure and return lines
Pitman Arm Compatibility: Works with factory and aftermarket arms
Finish: Black Painted Casting

**This gear fits 2009–2024 RAM 2500/3500 2WD & 4WD trucks without LaneSense Lane Departure Warning. If your truck has LaneSense, this gear won’t work—double-check before ordering. It bolts up to factory high-pressure and return lines and works with both OEM and aftermarket pitman arms.