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PSC Steering Extreme Series Steering Gear - PSC-SG400-N

PSC Steering | Part Number: PSMPSC-SG400-N


  • Fitment: Direct Fit
  • In_Stock: In Stock
  • In_Stock: In Stock


  • 03-06 Wrangler TJ/LJ
  • Large piston
  • 13:1 -16:1 variable ratio
  • Made in the USA


Say goodbye to remanufactured steering gears. PSC brings you the all new large piston ram assist Jeep replacement gear box. Featuring a large piston for more brute turning force and a 13:1-16:1 variable ratio for tight and accurate steering. Top it off with PSCs original billet end cap for the ultimate Jeep steering gear replacement.


Question & Answers

2 Answered questions

Hello, I have a 2005 lj rubicon that the steering box is worn out on( mercedes), will this box fit and what if any mods need to be done to fit? Is this a mercedes box or a different set up altogether?

Asked by Tim from surprise on

Hello, This is taken directly from PSC's Website. The 8200 series conversion steering gear is a direct replacement for the failure prone ZF steering gear that was used on 03-06 Jeep TJ’s and LJ’s. This unit also features a larger piston diameter which increases the torque output of the steering gear. This extra torque is Jeeps to overcome steering issues due to larger tires and / or locking differentials have been installed. The 8200 series is assembled in Texas using all new components and featuring PSC’s exclusive new gear housing. This is not a reworked core housing as the competition uses, this is a 100% new housing that is casted and machined right here in the USA! The SG400 is also offered in a cylinder assist version (SG400R) for vehicles that have 38” + tire size and larger drivelines (Dana 60). The conversion kit also includes a new power steering hose and everything needed for the installation. PSC does recommend the following to maximize performance; High Volume power steering pump to maximize the torque of the steering gear. Pump Kit # PK1852 for Jeeps equipped with the 4.0. Cooler kit to increase life of steering components part# DER13253 or PSC MBC100K Cooler kit to increase life of steering components part# DER13253 or PSC MBC100K

Answered by [email protected] from surprise on

Can this be used without cylinder assist ? Is a variable ratio better then a fixed ratio for a daily driver? Only replacing with factory gear box? For a daily driver? Will it be a lot better than stock? I'm running 35s

Asked by aaron from Michigan on

Aaron, the PSC Steering Extreme Series Steering Gear can be used with or without hydro assist. As for this box being better than stock it is a worthwhile upgrade especially with 35" tires. It will reduce the amount of turns to get to full lock and also will give you more responsive steering. Hope this helps!

Answered by Zach O. ext 4939 from Michigan on


Headquartered in Fort, Texas, Performance Steering Components (PSC) grew out of founder Tom Allen's business to re-manufacture rack & pinion steering gears originally launched over 30 years ago. He graduated to custom steering gear and system builds for off-road and racing applications and the business grew. Now, PSC Motorsports boasts over 200 dealers and its sales staff maintains an avid interest in off-road related innovations and events. 4WD carries a wide spectrum of PSC products for Jeeps including power steering conversion kits, Jeep steering boxes and Jeep hydraulic steering assists to keep your trips on and off the trail safe and smooth. Shop PSC Steering Now

This Product Fits the Following:

  • 2006  Jeep  Wrangler (TJ)  Rubicon  
  • 2006  Jeep  Wrangler (TJ)  SE  
  • 2006  Jeep  Wrangler (TJ)  Sport  
  • 2006  Jeep  Wrangler (LJ)  Unlimited  
  • 2006  Jeep  Wrangler (LJ)  Unlimited Rubicon  
  • 2006  Jeep  Wrangler (TJ)  X  
  • 2006  Jeep  Wrangler (TJ)  65th Anniversary Edition  
  • 2005  Jeep  Wrangler (TJ)  Rubicon  
  • 2005  Jeep  Wrangler (TJ)  SE  
  • 2005  Jeep  Wrangler (TJ)  Sport  
  • 2005  Jeep  Wrangler (TJ)  X  
  • 2005  Jeep  Wrangler (LJ)  Unlimited  
  • 2005  Jeep  Wrangler (LJ)  Unlimited Rubicon  
  • 2004  Jeep  Wrangler (TJ)  Rubicon  
  • 2004  Jeep  Wrangler (TJ)  Sahara  
  • 2004  Jeep  Wrangler (TJ)  SE  
  • 2004  Jeep  Wrangler (TJ)  Sport  
  • 2004  Jeep  Wrangler (TJ)  X  
  • 2004  Jeep  Wrangler (TJ)  Unlimited  
  • 2003  Jeep  Wrangler (TJ)  Rubicon  
  • 2003  Jeep  Wrangler (TJ)  SE  
  • 2003  Jeep  Wrangler (TJ)  Sahara  
  • 2003  Jeep  Wrangler (TJ)  Sport  
  • 2003  Jeep  Wrangler (TJ)  X