DT12 Transmission Services

Expert Care for Your Freightliner, Western Star, Peterbilt Trucks

At iShiftDT12, we are proud to offer a comprehensive range of services for the DT12 transmission system, specifically designed for Freightliner and Western Star heavy-duty trucks. Our certified technicians have extensive experience working on DT12 transmissions, ensuring your truck receives the highest level of care.

The Cascadia

About DT12 Transmissions:

The DT12 transmission is an automated manual transmission system developed by Detroit Diesel, a subsidiary of Daimler Trucks North America, for Freightliner and Western Star trucks. The DT12 transmission boasts improved fuel efficiency, driver comfort, and safety features, including intelligent gear shifting and an electronic control unit (ECU) that manages gear selection, clutch control, and engine synchronization.

Our DT12 Transmission Services:

Diagnostic Services

We utilize advanced diagnostic tools and technology to thoroughly assess your DT12 transmission system, identifying potential issues such as wear and tear, software problems, or component failures. Early detection helps prevent costly repairs and minimizes downtime.

Repair Services

Our certified mechanics use only genuine DT12 parts for repairs, ensuring top-quality and compatibility. We address issues like damaged gears, worn-out bearings, or malfunctioning sensors, providing efficient and reliable repairs to keep your truck performing optimally.

DT 12

Rebuild Services

Our skilled technicians can rebuild your DT12 transmission, carefully disassembling and inspecting each component to identify any damaged or worn parts. We then replace these parts with genuine DT12 components and reassemble the transmission, ensuring proper function and extending the life of your transmission system.



If your DT12 transmission has reached the end of its service life, our remanufacturing service offers a cost-effective alternative to purchasing a brand-new unit. We disassemble the entire transmission, clean and inspect all components, replace any worn or damaged parts with genuine DT12 components, and reassemble the unit to meet factory specifications. Our remanufactured transmissions deliver performance and reliability comparable to a new unit, at a fraction of the cost.



As a genuine DT12 parts supplier, we cater to fleets and shops, ensuring that they have access to the high-quality components necessary for maintaining and repairing DT12 transmissions. Our extensive inventory includes gears, bearings, sensors, seals, and more, all designed specifically for compatibility and performance with DT12 transmission systems.


The removal and installation of DT12 transmissions is a complex process that requires specialized knowledge and tools. Our professional technicians are experienced in performing re/re transmission services, ensuring that your truck is back on the road quickly and efficiently. We take care to properly align and calibrate the transmission during installation, guaranteeing optimal performance and seamless integration with your truck’s systems.



Trust iShiftDT12 for all your DT12 transmission needs. Our certified technicians are committed to providing top-notch services that keep your Freightliner or Western Star truck running smoothly. Contact us today to learn more about our DT12 transmission services and experience the difference of working with iShiftDT12.