Product Description
Restore steering precision and eliminate the notorious Dodge steering wander with the PSC SG853R Big Bore XD Cylinder Assist Steering Gearbox. Built specifically for 2003-2008 Dodge Ram 2500 and 3500 trucks, this heavy-duty PSC steering box is engineered using an upgraded 45mm sector shaft bearing and a larger piston diameter to dramatically increase steering torque and durability. The SG853R is ported for hydraulic ram assist and designed to work seamlessly with PSC cylinder assist steering systems for trucks running oversized tires, locking differentials, and heavy front axles. Unlike remanufactured factory steering boxes, the PSC SG853R features an all-new housing and upgraded internal components based on the newer Dodge XD platform. The result is tighter steering feel, improved durability, and the ability to support ram assist systems for serious off-road and heavy-duty towing applications.
Fitment
- 2003 Dodge Ram 2500 5.9L Cummins
- 2004 Dodge Ram 2500 5.9L Cummins
- 2005 Dodge Ram 2500 5.9L Cummins
- 2006 Dodge Ram 2500 5.9L Cummins
- 2007 Dodge Ram 2500 5.9L Cummins
- 2008 Dodge Ram 2500 6.7L Cummins
- 2003 Dodge Ram 3500 5.9L Cummins
- 2004 Dodge Ram 3500 5.9L Cummins
- 2005 Dodge Ram 3500 5.9L Cummins
- 2006 Dodge Ram 3500 5.9L Cummins
- 2007 Dodge Ram 3500 5.9L Cummins
- 2008 Dodge Ram 3500 6.7L Cummins
This gearbox is designed for trucks that require increased steering capacity due to large tires, suspension lifts, off-road use, or hydraulic steering assist systems.
Specifications for PSC SG853R
| Specification | Details |
|---|---|
| Manufacturer | PSC Steering Components |
| Part Number | SG853R |
| Steering Ratio | 13:1 (Approx. 3.25 turns lock-to-lock) |
| Sector Shaft Bearing | Upgraded 45mm Bearing |
| Assist Ports | -6AN Ram Assist Ports |
| Input Shaft | 3/4-36 Spline |
| Mounting | 3-Bolt Frame Mount |
| UPC | 687927178762 |
| GTIN | 687927178762 |
| Shipping Info | Free shipping on most orders |
| Prop 65 | WARNING: Cancer and Reproductive Harm – https://www.P65Warnings.ca.gov |
Frequently Asked Questions
What does the PSC SG853R steering gearbox improve?
The SG853R eliminates steering wander common on 3rd-gen Dodge Ram trucks by using a larger 45mm sector shaft bearing and stronger internal components.
Is the PSC SG853R compatible with hydraulic ram assist?
Yes. This steering gearbox is ported with -6AN fittings specifically for hydraulic steering assist cylinders.
Does this steering box require a core return?
No. The PSC SG853R is built using a brand-new housing and components, so no core return is required.
Can I use factory steering lines and pitman arm?
Yes. The PSC SG853R is designed as a direct bolt-in replacement that works with the factory pitman arm and OEM power steering lines.
Is this compatible with steering box braces?
No. PSC does not recommend using aftermarket steering braces such as the SB300K with the SG853R gearbox.
