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
The Detroit® DD13® and Detroit® DD15®, are both designed with the best in cutting-edge diesel engine technology for optimized power, durability, productivity and efficiency.
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.
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.
*Application approval required over 160,000 lbs. **Application approval required over 170,000 lbs