Big Bore Xd® Steering Systems – RAM 2500/3500 W/ Lane Assist (2020–2024)

Regular price $1,195.00
Sale price $1,195.00 Regular price
Unit price
Standard Steering Gear
Cylinder Assist Steering Gear
Big Bore Xd® Steering Systems – RAM 2500/3500 W/ Lane Assist (2020–2024)

Big Bore Xd® Steering Systems – RAM 2500/3500 W/ Lane Assist (2020–2024)

Product description
Fitment
Specs
Why you’ll love it
California Prop 65 Warning
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If you’ve got a 2020–2024 RAM 2500 or 3500 with Lane Assist and you’re tired of vague steering or fighting the wheel under load, PSC’s BIG BORE XD Steering Solutions are built to fix that. These steering gears and kits are designed to work with your factory torque overlay system, so you get tighter control, better handling, and no warning lights or compatibility issues.

The SG857 gear features PSC ported, balanced, and tuned valving, a massive internal piston, and a 45mm sector shaft supported by a beefed-up lower bearing. That means no more wandering, no more steering brace needed, and no more second-guessing your truck’s handling.

Want even more control? The Cylinder Assist version adds hydraulic muscle to help turn big tires like they’re stock. And if you’re ready to go all-in, the complete Cylinder Assist Kit includes everything you need—gear, ram, hoses, brackets, and fluid—all bolt-on and ready to roll.

Heads‑up for installers

These steering gears are built specifically for RAM trucks equipped with LaneSense Lane Departure Warning.

If your truck doesn’t have Lane Assist, check out the SG856 Series instead.

Always flush your system before installing new components.

What’s included

  • SG857R Cylinder Assist Steering Gear
  • CAK858 Bolt-On Cylinder Assist Axle Kit
  • Fully assembled hoses and fittings
  • Mounting brackets and hardware
  • PSC 715 Power Steering Fluid

 Use it with

  • RAM 2500/3500 trucks (2020–2024)
  • Factory torque overlay systems
  • PSC high-performance pumps and remote reservoirs
  • PSC Cylinder Assist axle kits (included in full kit)

OEM Cross Reference

  • Mopar 68236674AD Direct Replacement - SG857-OE
  • Mopar 68534021AC Direct Replacement - SG857R
  • Mopar 68534021AC Direct Replacement - SG857
  • RAM 2500 & 3500 (2020–2024)
  • 2WD and 4WD models
  • Compatible with LaneSense Lane Departure Warning
  • Steering Gear Models: SG857 (Standard), SG857R (Cylinder Assist®)
  • Sector Shaft Diameter: 45mm
  • Internal Piston: 80mm
  • Steering Ratio: 16:1
  • Valving: PSC ported, balanced, and tuned

Compatibility: Works with factory torque overlay system

Finish: Black painted casting

  • Works with Lane Assist – no warning lights, no issues
  • Bolt-on install – no cutting, no welding, no guessing
  • Cylinder Assist option – turns big tires with ease
  • PSC-tuned valving – smooth, confident steering feel
  • 100% new parts – no core charge, no rebuilds

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

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