Performance and durability under extreme conditions. That’s what the Detroit® DT12® Vocational Series transmissions bring to every job. Our two vocational models – the DT12®-V and DT12-VX – are now available in Western Star X-Series trucks. No road, trail or work site is too extreme for these sturdy, tested Detroit® transmissions to handle.
Performance on demand.
A superior power launch option.
The Power Launch feature automatically increases engine speed to 1,200 RPM to ensure smooth, powerful take-offs with heavy loads—all while protecting the clutch and driveline.More Specs and Details
As automated manual transmissions (AMT), the DT12-V and DT12-VX combine the benefits of manual and automatic designs. With computer-controlled shifting and clutch engagement, only two pedals are needed to operate the truck: the brake and accelerator. Even a less experienced driver can get to work with minimal effort, maximum productivity and all the power you need.
DT12 Vocational Series transmissions offer the ideal blend of technology and toughness. They’ve been tested for thousands of miles with precise engineering for jobsite environments, and provide 12 speeds for increased efficiency and flexibility. Also, seamless integration with Detroit engines and safety systems promotes optimal performance that you can’t get anywhere else. All told, these transmissions are equipped to meet any challenge you face.More Specs and Details
DT12 Vocational Series transmissions vary across a range of truck models.
Don’t let maintenance issues stop productivity in its tracks. Detroit Connect Virtual Technician® remote diagnostics system has your back. When it triggers a fault code, it tells you what it is, and how serious it is—as well as where, when and how to fix the issue. It keeps you informed, so you can make better maintenance decisions and get back to work faster.Learn More
Learn more by visiting the nearest Western Star dealership.Find Nearest Dealer
Trained technicians are ready to serve you and your DT12 Vocational Series transmissions at any of our 800+ authorized Detroit locations across the highways and back roads of North America.Parts & Service
The Detroit™ Connect portal is easy-to-use, one-stop-shop for all vehicle performance data gathered, transmitted and analyzed by Detroit Connect. The portal gives you access to insights delivered by Detroit Connect Virtual Technician℠. The Detroit Connect portal will also give you access to new features, such as Remote Updates, and Analytics, available late 2017.Detroit connect portal login
All DDCSN content has been migrated to our DTNAConnect web portal. All information previously on the DDCSN is now on DTNAConnect. We have created a quick reference guide to help you locate the migrated content on DTNAConnect. Existing DDCSN login credentials will also work with DTNAConnect. Please work with your security administrators for login or content issues. If you do encounter any technical issues, please contact the Software Support Center at or firstname.lastname@example.orgDTNA CONNECT PORTAL LOGIN
DTNA Connect is the starting point for working with all brands and franchises that fall under the Daimler Trucks North America umbrella: Detroit, Thomas Built Buses, SelecTrucks, Sterling, Freightliner, and Western Star. Here, you can access the full spectrum of online applications, resources and tools you need. Whether you use DTNA online resources to complete repairs, purchase parts, submit warranty claims, spec new vehicles or track the status of your truck orders, DTNAConnect streamlines the tasks and activities that are part of your daily work routine.DTNA Connect Portal Login