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  • Steering kit with gear, cylinder, four PSC 715 bottles, pump, clevis joints, hoses, fittings, hardware, mounts, reservoir and clamp in front of a white background.
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BIG BORE XD® Cylinder Assist® Kit – GM 2500 / 3500 4WD – Straight Axle Conversion

BIG BORE XD® Cylinder Assist® Kit – GM 2500 / 3500 4WD – Straight Axle Conversion

$2,605.00
$2,605.00
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Part Number: SK336

Vehicle | Model Year

This BIG BORE XD Cylinder Assist® Steering Kit is designed for GM 2500 and 3500 straight axle conversions using a Dana 60 front axle. Built to provide increased steering authority for larger tires and demanding off-road applications, it delivers the additional steering force needed for crawling, trail use, and other severe-duty conditions.

The kit includes a PSC BIG BORE XD steering gear, high-performance pump kit with remote reservoir, Cylinder Assist® cylinder with mounting hardware, and hose assemblies designed to work together as a complete steering system. Engineered for proper fit, performance, and reliability, these components provide the steering control and durability required for vehicles equipped with larger tires and heavy-duty axle upgrades.

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About:About:

Why you’ll love it

  • Built for straight axle conversions – no more steering struggles
  • Turns big tires with ease – even aired down on the trail
  • Complete kit – everything you need in one box 
  • PSC-trusted components – tested and trail-proven
  • PSC 715 fluid recommended – keeps things cool and smooth

Tech InfoTech Info

Heads‑up for installers

This kit is designed for Dana 60 straight axle conversions on 1988–1998 or 1999.5-2006 GM 2500/3500 4WD trucks. It can be installed on IFS trucks, but you’ll need a reduced stroke cylinder (6.0"–6.5") to make it work. A fluid cooler is highly recommended to protect your pump and keep the system running strong.

Fitment

  • GM 2500 & 3500 4WD (1988–1998)
  • GM 2500/3500 4WD trucks (1999.5-2006)
  • Straight axle conversions (Dana 60)
  • Can be adapted to IFS with reduced stroke cylinder

Use it with

  • GM 2500/3500 4WD trucks (1988–1998)
  • GM 2500/3500 4WD trucks (1999.5-2006) 
  • Dana 60 straight axle conversions 
  • PSC fluid coolers and PSC 715 Power Steering Fluid

Specs

  • Steering Gear: SG840R – Big Bore Cylinder Assist Steering Gear
  • Pump Kit: High-performance pump with remote reservoir
  • Cylinder: 1.5" PSC Assist Cylinder with hardware 
  • Hose Kit: Complete installation hose kit
  • Fluid: PSC 715 recommended
  • Compatibility: Straight axle conversion (IFS adaptable with reduced stroke)

What’s included

  • SG840R Cylinder Assist Steering Gear
  • High-Performance Pump Kit with Remote Reservoir
  • Steering Cylinder Assist Kit with Hardware
  • Steering Cylinder Assist Installation Hose Kit

Overall rating: 4.0 / 5 from 1 reviews.

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Looks good

"Looks good"

— Darel T. (4/5)

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California Prop 65 Warning

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