Dana Spicer D170-391
D170391GTP

The Dana Spicer D170 Series is a heavy-duty tandem drive axle differential designed to meet the demands of high-torque, high-load applications. Engineered for maximum durability, the D170 offers a rugged design, advanced gearing technology, and a wide selection of gear ratios for performance tuning across various vocational and on-highway applications.

Built to handle extreme duty cycles, the D170 differential is well-suited for refuse trucks, construction vehicles, and long-haul transport. It features dual-reduction gearing with a spiral bevel input and helical inter-axle gearing, which improves power flow and minimizes wear. The D170 is also known for its high torque capacity, enhanced thermal management, and long maintenance intervals, making it a cost-effective solution for fleet operators.

Technical Specifications

General Features:

Tandem drive axle differential designed for severe-duty and high-GVWR applications
Heavy-duty, dual-reduction gear system for maximum torque transfer
Designed for on-highway, off-highway, and vocational truck markets

Axle Rating & Load Capacity:

Gross Axle Weight Rating (GAWR): 46,000 lbs (20,865 kg)
Maximum GCW (Gross Combined Weight): up to 160,000 lbs (72,575 kg)

Gear Design and Ratios:

Gear Type: Dual-reduction with spiral bevel input and helical inter-axle gearing
Ring Gear Diameter: 17 inches (432 mm)
Input Shaft Spline Count: 39-spline (standard)
Available Gear Ratios:
- 3.07, 3.31, 3.55, 3.70, 3.91, 4.10, 4.33, 4.56, 4.78, 5.13, 5.29, 5.38, 5.57, 5.86

Construction and Materials:

Carrier Housing: Cast ductile iron for strength and resistance to thermal and mechanical stress
Heat-treated alloy steel gears for extended wear life
High-strength axle shafts and differential case

Lubrication and Cooling:

Pressurized lubrication system with internal channels for improved oil flow
Optional lube pump for severe service applications
Oil Capacity: Approx. 20–22 quarts per axle (varies by configuration)

Differential Lock and Traction:

Inter-axle differential lock (power divider lock) standard on most models
Optional driver-controlled lockers for additional traction in off-road or poor-traction conditions
Enhanced traction options for logging, oilfield, and off-road conditions

Suspension & Brake Compatibility:

Compatible with a wide range of suspensions: air, mechanical, and walking beam
ABS sensor-ready hub configurations available
Multiple track widths and axle housing configurations for OEM flexibility

Serviceability and Maintenance:

Modular carrier design for simplified removal and service
Extended lubrication change intervals (depending on oil type and duty cycle)
Standardized internal parts with other Dana heavy-duty axles for easier sourcing

Applications:

Refuse and sanitation trucks
Dump and construction vehicles
Logging and forestry trucks
Oilfield and mining support vehicles
Heavy-haul and specialty vocational trucks
On-highway trucks requiring high GCW capacity

Key Benefits:

High-capacity axle designed for maximum torque and heavy payloads
Dual-reduction gear design provides strength and smooth torque transfer
Broad gear ratio range allows for tuning performance and fuel efficiency
Designed for longevity and reduced downtime in severe-duty applications
Supported by Dana’s global service network and parts availability

DOWNLOAD D170 MANUAL

Weight	20 lbs
Category	Differential & Axle
Subcategory	Axle Shafts

Dana GGASR102-1 Axle Shaft

Product Categories

Related products

Dana/Spicer D170-391 Differential

Dana 039448 Diff Bearing Adjuster

Dana 031562 Diff Bearing Adjuster – OEM Replacement Part

Dana 025971 Diff Spider

Dana 021637 Diff Bearing Adjuster