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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® enhanced engine options, Detroit® transmissions and axles, all designed to work together seamlessly for unmatched performance.

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Engines

The Detroit® DD13® Gen 5 and Detroit® DD15® Gen 5, 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.

DETROIT DD13 GEN 5

Available in the 57X, 47X49X

  • Horsepower370-525 HP
  • Torque Range1,250-1,850 lb-ft.
  • Displacement12.8 L

DETROIT DD15 GEN 5

Available in the 57X49X

  • Horsepower 425-505 HP
  • Torque Range 1,550-1,850 lb-ft.
  • Displacement 14.8 L

DETROIT DD16

Available in the 57X49X.

  • 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

Available in the 47X & 49X.

  • 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
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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.

 

Learn More >

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-H

Available in the 57X

Automated Manual Transmission

  • Torque Range up to 2,050 lb-ft.
  • GCW 140,000 lbs
  • Rear 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

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 330,000lbs.*
  • Rear PTO Yes
  • Bottom PTO Yes

EATON FULLER

Available in the 57X, 47X & 49X.

Manual And Automated
Manual Transmissions

  • Torque Range 1,450-2,250lb-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

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