STEERING BOX KIT, BIG BORE XD - PSC ('98-'99, 2500/3500 4WD)

Item #: PSC-SG852K3
  • About This Product
  • Reviews


A common failure point of the 2nd Generation Dodge 2500/3500 4WD Truck steering gearboxes is the lower sector shaft bearing and seal. This is due to the OEM single bearing design.

PSC now offers an Extreme Duty replacement that features a 45MM sector shaft and bearing that virtually eliminates side-to-side deflection. Designed with a 16:1 steering ratio that delivers 3.5 turns lock-to-lock and a modern variable valve for stable on-the-road driving and effortless maneuvering.

  • Reuses OEM pitman arm
  • 45mm bearing and sector shaft to eliminate any side-to-side flex
  • 16:1 ratio for easier parking and less turns lock-to-lock
  • 85mm piston for more turning force
  • Fits 4WD trucks with T-style steering
  • Has same input shaft as factory gear box so OEM or Borgeson steering shaft is a direct bolt-on
  • Will not work with any steering box braces
FITMENT NOTE:This product only fits 1998-1999 models equipped with OEM Dodge Heavy Duty T-Type Steering Linkage.

This product is NOT compatible with Factory 1994-1997 Dodge Light Duty Y-Type Steering Linkage, Factory 2003-08 Dodge Steering Linkage, and may not be compatible with aftermarket T-Type Steering Linkage.

NOTE: Due to the increased overall size of the Big Bore extreme-duty steering gear spacers are included in the kit to space the gear box off the frame. There is a 1" difference from the OEM steering gear. We suggest trimming the draglink and tie-rod at pitman arm 1/2" to clear for alignment.

NOTE: This Kit fits the '98-'99 Ram 2500/3500 4WD trucks.

NOTE: This PSC Steering Box Kit is not compatible with any aftermarket steering box braces.

NOTE: This steering box will not work on Cab/Chassis trucks as they use a different chassis than the pickup trucks.


Write a review
PSC steering box upgrade
Jul 31, 2018  |  By Chuck Krause
This is a heavy, massive box compared to OEM is a bit of a challenge to install. Tight fit but is one of the best upgrades I've made to this truck. I love how this truck steers now and is very tight. I love it.

Works good now
May 25, 2018  |  By PAUL
The Steering gear box works great now. But there are no instructtion included. When I first installed it it would turn full lock to the right but only about 30 % to the left. The only way I could get it to work right was to bend the drag link in two places. Not easy as it is one inch thick steel. I had to heat it red hot to bend it. I do have a 2 inch leveling kit installed. This might have been partly at fault. But seems for $700 someone should have figured this out before me. Would rate five stars if some instructions were included. I even called PSC and no one there had hear of my problem or knew what to do even though someone on the internet reported the same problem I had.

PSC Steering Box
May 20, 2018  |  By Chris Harris
I recently ordered the PSC steering box (SG852). I am impressed with how well built this unit is. My steering was much tighter after installing it. Installation of the box is somewhat challenging due to it's enormous size and hefty weight. So far I love it!

Install and Tech Information