POWERTRAINS
WESTERN STAR OFFERS COMPONENTS THAT DELIVER THE POWER AND RELIABILITY YOU CAN COUNT ON.
Whether hauling gravel out of a quarry or driving over-the-road, give your X-Series truck the power and dependability provided by Detroit® engines, transmissions and axles, all designed to work together seamlessly for unmatched performance.
ENGINES
Detroit® engines bring proven power and efficiency to Western Star trucks. The new Detroit Gen 6 DD13, DD15, and DD16 engines build on that foundation with advanced diesel engine technology designed to help improve performance, durability, productivity and uptime.
Western Star provides a wide range of new vehicle engines compliant with EPA, CARB emissions, GHG, and OBD requirements. Please consult your local dealer to ensure the selection of a product that meets your specific needs.
DETROIT DD13
Available in the 47X & 49X.
- Horsepower410-525 HP
- Torque Range1,450-1,850 lb-ft.
- Displacement12.8 L
- Power Hood AvailabilityNo
DETROIT DD15
Available in the 49X.
- Horsepower425-505 HP
- Torque Range1,650-1,900 lb-ft.
- Displacement14.8 L
- Power Hood AvailabilityYes
DETROIT DD16
Available in the 49X.
Gen 6 coming in 2028
- Horsepower560-605 HP
- Torque Range1,850-2,050 lb-ft.
- Displacement15.6 L
- Power Hood AvailabilityYes
CUMMINS L9
Available in the 47X.
- HorsepowerUp to 380 HP
- Torque RangeUp to 1,150 lb-ft.
- Displacement8.9 L
- Power Hood AvailabilityNo
CUMMINS X12
Available in the 49X.
- Horsepower350-500 HP
- Torque Range1,200-1,700 lb-ft.
- Displacement11.8 L
- Power Hood AvailabilityNo
CUMMINS X15
Available in the 49X.
- Horsepower400-605 HP
- Torque Range1,450-2,050 lb-ft.
- Displacement14.9 L
- Power Hood AvailabilityYes
AXLES
Detroit® axles are a proven platform for maneuverability and versatility, with reliable and durable results over millions of miles and the most demanding work environments.
TRANSMISSIONS
The line-up of DT12® automated manual transmissions have been specially engineered and rigorously tested for the unique needs of the on-highway and vocational markets. Legendary Detroit quality is combined with cutting-edge technology and more robust features for even greater dependability and wider applications.
DETROIT DT12-VL
Available in the 47X.
Automated Manual Transmission
- Torque Range 1,650 lb-ft.
- GCW 80,000 lbs
- Rear PTO Yes
- Bottom PTO No
DETROIT DT12-V
Available in the 47X & 49X.
Automated Manual
Vocational Transmission
- Torque Range up to 2,250 lb-ft.
- GCW 160,000 lbs
- Rear PTO Yes
- Bottom PTO Yes
DETROIT DT12-VX
Available in the 49X.
Automated Manual Extreme
Vocational Transmission
- Torque Range up to 2,500 lb-ft.
- GCW 275,000lbs.*
- Rear PTO Yes
- Bottom PTO Yes
EATON FULLER
Available in the 47X & 49X.
Manual And Automated
Manual Transmissions
- Torque Range 1,450-2,050lb-ft.
- GCW 170,000.**
- Rear PTO Yes
- Side PTO Yes
ALLISON
Available in the 47X & 49X.
Automatic
Transmissions
- Torque Range 1,250-1,850lb-ft
- GCW 170,000.**
- Rear PTO Yes
- Side PTO Yes
*Application approval required over 160,000 lbs. **Application approval required over 170,000 lbs
