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® engine, transmissions and axles, all designed to work together seamlessly for unmatched performance.
Engines
The Detroit® DD13® and Detroit® DD15®, both redesigned with the best in cutting-edge diesel engine technology and engineering for increases in power, durability, productivity and efficiency. The Detroit® DD16®, the industry’s only 16-liter engine, delivers up to 600 HP and 2,050 lb-ft for demanding applications.
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 57X, 47X & 49X.
- Horsepower370-525 HP
- Torque Range1,250-1,850 lb-ft.
- Displacement12.8 L
DETROIT DD15
- Horsepower 425-505 HP
- Torque Range 1,550-1,850 lb-ft.
- Displacement 14.8 L
DETROIT DD16
- Horsepower 500-600 HP
- Torque Range 1,850-2,050 lb-ft.
- Displacement 15.6 L
CUMMINS L9
Available in the 47X.
- HorsepowerUp to 380 HP
- Torque RangeUp to 1,150 lb-ft.
- Displacement8.9 L
CUMMINS X12
- Horsepower350-500 HP
- Torque Range1,200-1,700 lb-ft.
- Displacement11.8 L
CUMMINS X15
Available in the 49X.
- Horsepower 400-605 HP
- Torque Range1,450-2,050 lb-ft.
- Displacement 14.9L
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 applications.
Detroit DT12-HE
Available in the 57X.
Automated Manual Transmission
- Torque Range up to 2,250 lb-ft.
- GCW 160,000 lbs
- Rear PTO Optional
- Side PTO Optional
Detroit DT12-HL
Available in the 57X.
Automated Manual Transmission
- Torque Range up to 1,650 lb-ft.
- GCW 80,000 lbs
- Rear PTO Optional
DETROIT DT12-V
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
*Application approval required over 160,000 lbs. **Application approval required over 170,000 lbs
