The Dana Spicer DS404-264 is a high-performance, heavy-duty tandem drive axle differential designed for use in Class 8 trucks and severe-duty vocational vehicles. Known for its strength, dependability, and ease of maintenance, the DS404 features a hypoid gear design that ensures efficient power transmission with reduced noise and vibration.

Engineered to support a gross axle weight rating (GAWR) of 40,000 lbs, the DS404 is built with a rugged cast ductile iron housing and heat-treated components for extended service life. It is highly configurable, offering a wide range of gear ratios and compatibility with various suspension systems and brake configurations. This makes it a preferred choice for fleets requiring cost-effective, long-lasting driveline solutions.

Technical Specifications

General Features:

Tandem drive axle differential for heavy-duty applications
Single-reduction, hypoid gear design
Designed for both on-highway and vocational use

Axle Rating & Capacity:

Gross Axle Weight Rating (GAWR): 40,000 lbs (18,144 kg)
Designed for Class 8 trucks and severe-duty environments

Gear and Shaft Details:

Ring Gear Diameter: 15.25 inches (387.35 mm)
Input Shaft Spline: 39-spline standard
Available Gear Ratios:
- 3.08, 3.21, 3.36, 3.55, 3.70, 3.90, 4.10, 4.33, 4.63, 4.88, 5.29

Construction and Materials:

Housing: Cast ductile iron for high strength and durability
Heat-treated, high-strength steel gears

Carrier Configuration:

Carrier Type: DS-style (downward spiral hypoid)
Carrier Weight (approx.): 678 lbs (308 kg)

Lubrication System:

Internal pressurized lubrication for improved cooling and component life
Optional lubrication pump for high-demand environments
Oil Capacity (approx.): 16–18 quarts per axle, depending on configuration

Differential Locking Options:

Optional inter-axle differential lock (power divider lock) for improved traction
Air-actuated locking systems available

Suspension and Brake Compatibility:

Compatible with air, leaf, and walking beam suspension systems
Multiple track widths available
ABS sensor-ready hubs optional

Serviceability and Maintenance:

Standardized design with widely available replacement parts
Easily removable carrier for in-shop servicing
Sealed input for reduced lubricant loss

Applications:

Long-haul trucking
Construction and dump trucks
Logging and forestry vehicles
Refuse and waste management trucks
Mining and oilfield support vehicles

Key Benefits:

High-torque, high-load capability
Quiet, smooth operation due to hypoid gear design
Wide range of gear ratios for fuel economy and performance optimization
Designed for ease of maintenance and reduced downtime
Proven durability in demanding fleet environments

DOWNLOAD DS-404 MANUAL

Weight	9 lbs
Category	Differential & Axle
Subcategory	Housings

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