Product Description
Upgrade the steering performance of your heavy-duty Dodge truck with the PSC SG853 Big Bore XD Power Steering Gearbox. Designed specifically for 2003-2008 Dodge Ram 2500 and 3500 trucks, this premium steering gearbox eliminates the common steering wander and slop associated with factory steering boxes. Built from 100% new components—not remanufactured cores—the SG853 uses PSC’s exclusive Big Bore XD design derived from the stronger 2010+ Ram steering platform for improved durability, tighter steering response, and greater torque output. The larger piston diameter and upgraded 45mm sector shaft support bearing dramatically reduce shaft deflection—the main cause of loose steering in third-generation Dodge trucks. With a quicker 13:1 steering ratio and increased torque capacity, the PSC SG853 is ideal for trucks running larger tires, heavy front axle loads, or off-road setups. It installs as a direct bolt-in replacement using the factory pitman arm and OEM high- and low-pressure steering hoses for straightforward installation.
Fitment
- 2003-2008 Dodge Ram 2500 4WD (Gas or Diesel)
- 2003-2008 Dodge Ram 3500 4WD (Gas or Diesel)
- 2005-2008 Dodge Ram 1500 Mega Cab 4WD
Notes:
- Direct bolt-in replacement steering gearbox
- Uses factory pitman arm and OEM power steering lines
- Most steering gearbox braces are not compatible with SG853
- No core charge required
Specifications for psc SG853
| Specification | Details |
|---|---|
| Manufacturer | PSC Steering Components |
| Part Number | SG853 |
| Steering Ratio | 13:1 Ratio – 3.25 Turns Lock-to-Lock |
| Input Shaft | Dodge 3/4-36 Spline |
| Mounting Style | 3-Bolt Inside Frame Mount |
| Port Type | Metric O-Ring |
| UPC | 687927184121 |
| GTIN | 687927184121 |
| Shipping Info | Free Shipping |
| Prop 65 | WARNING: Cancer and Reproductive Harm – https://www.P65Warnings.ca.gov |
Frequently Asked Questions
What problem does the PSC SG853 steering gearbox fix?
The SG853 addresses common steering wander, loose steering feel, and sector shaft deflection found in factory Dodge Ram steering boxes.
Is the PSC SG853 a remanufactured steering box?
No. The SG853 is built from 100% new components with a new gear housing rather than a rebuilt factory core.
Will this gearbox work with my factory pitman arm?
Yes. The PSC SG853 is designed to reuse the factory pitman arm and OEM high- and low-pressure steering hoses for direct installation.
Is a steering brace required with this gearbox?
No. Most steering braces are not compatible with the SG853, and the upgraded 45mm sector shaft support bearing helps eliminate the deflection that braces are designed to address.
Is there a core charge for this steering gearbox?
No core charge is required because the PSC SG853 is a brand-new steering gearbox, not a remanufactured unit.
