DETROIT AXLE 4GS472990 Steering Gear Box Kit 1603GB
fits model: F-150, 4wd, Navigator, Expedition. make: Lincoln, Ford.
( Brand: Detroit Axle ), ( Manufacturer Part Number: 4GS472990 ), ( Type: Gearbox Kit ), ( Manufacturer Warranty: Lifetime ), ( Oe/oem Part Number: 1603gb, K8739, K8700, Ds1426 ), ( Fitment Type: Direct Replacement )
Review DETROIT AXLE Steering Gear Box Assembly Kit Lincoln Ford fits NAVIGATOR EXPEDITION F-150 4WD
The **Detroit Axle 4GS472990 4WD Steering Gear Box Kit** is a high-performance, precision-engineered component designed exclusively for the heavy-duty demands of full-size SUVs and trucks, including the **Ford F-150, Lincoln Navigator, and Ford Expedition**. This robust steering gear box kit is a direct-fit replacement for the original equipment (OEM) steering gear assembly, ensuring seamless integration with the **Detroit Axle 4GS series** four-wheel-drive systems, which are renowned for their durability, reliability, and superior off-road capability. Crafted from premium materials, this kit features a **heavily reinforced housing** that resists wear, corrosion, and the stresses of extreme off-roading, towing, or heavy-duty applications, making it an ideal upgrade for enthusiasts and professionals alike. The steering gear box incorporates a **high-precision worm-and-sector mechanism**, delivering smooth, responsive steering even under the most demanding conditions, while its **sealed and lubricated design** minimizes maintenance requirements and extends operational life. Whether navigating rough terrain, hauling heavy loads, or tackling challenging off-road trails, this kit ensures consistent performance and confidence in steering control. Backed by Detroit Axle s reputation for engineering excellence, this steering gear box kit is a critical component for maintaining optimal functionality in vehicles equipped with their **4GS series transfer cases**, providing a perfect balance of strength, precision, and longevity.
### **Pros and Cons of buying a Detroit Axle 4GS472990 4WD Steering Gear Box Kit for Lincoln Navigator, Ford Expedition, and F-150**
#### **Pros:**1. **Compatibility** This kit is specifically designed for the Lincoln Navigator, Ford Expedition, and F-150 (depending on the drivetrain configuration), ensuring a proper fit without modifications.
2. **Durability** Detroit Axle is a well-known manufacturer in the heavy-duty and off-road aftermarket, known for producing reliable and robust components.
3. **Improved Steering Response** A high-quality steering gear box can enhance precision and reduce play, making off-road driving more controlled.
4. **Off-Road Capability** If you frequently drive in rough terrain, this kit may provide better articulation and steering stability compared to stock units.
5. **Potential Longevity** Properly installed and maintained, this kit could outlast the original equipment, reducing long-term replacement costs.
6. **Aftermarket Support** Detroit Axle components are widely available, and there is a strong community of mechanics and enthusiasts who can assist with installation and troubleshooting.
7. **Potential Performance Boost** Some users report improved steering feel and reduced wear on related components, such as tie rods and ball joints.
#### **Cons:**1. **Cost** This is a premium aftermarket part, and the price may be significantly higher than an OEM replacement, especially if the original unit is still functional.
2. **Installation Complexity** Replacing a steering gear box requires mechanical skill and access to proper tools. If you re not experienced, labor costs at a shop could add up.
3. **Potential Overkill for Everyday Use** If you primarily drive on highways or smooth roads, the benefits may not justify the expense unless you re upgrading for off-road or heavy-duty use.
4. **Compatibility Risks** While the kit is designed for these vehicles, slight variations in model years or trim levels could lead to fitment issues if not verified.
5. **Warranty Considerations** Some OEM warranties may be voided if aftermarket parts are installed, and the Detroit Axle warranty may not cover all potential issues.
6. **Maintenance Requirements** Like any high-performance component, this kit may require more frequent inspections and lubrication to prevent premature failure.
7. **Resale Impact** If you plan to sell the vehicle later, some buyers may prefer OEM parts, potentially affecting resale value.
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### **Conclusion**
The **Detroit Axle 4GS472990 4WD Steering Gear Box Kit** is a solid choice for **off-road enthusiasts, heavy-duty towing applications, or those upgrading from a worn-out stock unit**. It offers **improved durability, better steering control, and long-term reliability**, but it comes at a **higher cost and requires careful installation**. If you re driving primarily on pavement and the stock unit is still in good condition, the investment may not be necessary. However, for **serious off-roaders, overlanding enthusiasts, or those who demand maximum performance**, this kit is a worthwhile upgrade.
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### **Recommendation**
- **Buy if:**- You frequently drive off-road or in rough terrain.
- Your current steering gear box is worn, leaking, or causing excessive play.
- You re already investing in other Detroit Axle components (e.g., axles, diffs) and want a full system upgrade.
- You have the mechanical skill (or access to a trusted mechanic) to install it properly.
- **Avoid if:**- You drive mostly on highways or smooth roads and the stock unit is still functional.
- You re on a tight budget and can t justify the cost without clear performance benefits.
- You re unsure about installation consider hiring a professional to avoid costly mistakes.
**Final Verdict:** For **off-road and heavy-duty applications**, this is a **strong upgrade**. For **daily drivers**, weigh the cost against the benefits before purchasing. Always verify compatibility with your exact vehicle model before buying.
Details:
With an OE design, simple installation and long life as a guarantee. 1x Front Steering Link - DS1426. Detroit Axle offers an extensive coverage of bearings for a large range automotive and heavy-duty wheel end applications. Air Tested, Ensures No Leaking and Quality Performance, Hydraulically Tested High low pressure applied to e sure internal by-passing, Road Simulation Testing Each gear box is checked for proper functionality.
Complete Power Steering Gear Box Assembly Kit. Manufacturer Information. Search our to find the right part. Return your old Gear Box to activate Lifetime Warranty.
Brand Information. 1x Complete Power Steering Gear Box Assembly - 1603GB. 1x Front Idler Arm w/ 2.48 Bolt Pattern - K8739T. Not what you were looking for.
1x Steering Pittman Arm - K8700. Kit Includes. Manufactured with Internal bearing seals that are specifically designed to combat all types of road conditions keep debris out and the turning. Detroit Axle products deliver the look, feel, fit and performance of OE.
Gear Box Re-manufacturing Information.
part #: 4gs472990 prices
- $203.65-$250.95
specifications pitmanidlear:
- for models: F-150, 4wd, Navigator, Expedition
- for makes: Lincoln, Ford
- brand: Detroit Axle
- mpn: 4gs472990
- type: Gearbox Kit
- manufacturer warranty: Lifetime
- oe/oem part number: 1603gb, K8739, K8700, Ds1426
- fitment type: Direct Replacement
payments pitmanidlear:
- wallet: Google-pay
- other
- credit card: Discover
returns pitmanidlear:
- time: 30 Days
- paid by: Seller
- policy: Returns Accepted
seller pitmanidlear:
- city: Detroit, Michigan
- rating: 99.3%
- # reviews: 1313696
offer pitmanidlear:
- started: February 2, 2026
- availability: In Stock
- sold: 0
- options: Ship-to-home
shipping pitmanidlear:
- class: Expedited
- transit: 4-4 Days
- type: Fixed
- service: Expedited
- cost: $0.00
general pitmanidlear:
- condition: New other see details
- Car Truck Parts Accessories > Steering Suspension > Gearboxes, Rack Pinions
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