Detroit launched the DT12-VL, the latest addition to its DT12 Vocational transmission lineup.

This automated manual transmission is engineered for heavy-duty vocational applications where maximizing payload is critical, such as mixers, dumps, bulk haulers, and other weight-sensitive heavy-duty vocational applications.

The DT12-VL delivers enhanced off-road performance and superior drivability, all in a lightweight package, according to the company.

Offering a 125-pound weight savings over the DT12-V, the new transmission supports gross combination weights up to 80,000 pounds. Detroit said it delivers excellent low-speed torque, smooth shifting, and improved efficiency.

Key features include:

• Torque rating of 1,650 pound-feet

• Rear PTO

• A wide ratio range from 11.67 (first gear) to 0.78 (top gear)

• 12 forward speeds

• Up to four reverse speeds. 

"When we introduced the DT12-V and DT12-VX, we raised the bar in terms of how an automated manual transmission performs in the vocational market,” said Aaron Scates, vice president vocational and medium duty market development, Daimler Truck North America, in an news release.

“Features like Hill Start Aid, Off-Road, Rock-Free, and Paver mode give operators confidence in both capability and control. With the DT12-VL, we can offer the benefits of the Vocational DT12 to customers that need to maximize payload."

Smarter Software, Built for the Jobsite

The DT12-VL includes three standard vocationally focused features that improve drivability in challenging environments:

• Off-Road mode holds gears longer and shifts at higher engine speed to maintain momentum on uneven terrain.

• Rock Free mode helps free the vehicle when stuck by modulating the clutch with accelerator input, reducing driveline stress, and improving traction. 

• Paver Mode enables smooth transitions from Neutral to Drive without brake input, supporting a continuous flow of materials during paving operations.

Detroit’s Vocational Transmission Family

The DT12-VL joins Detroit’s vocational transmission family, which includes the DT12-V and DT12-VX. 

• Compatible with the Detroit DD13 engine, the DT12-VL is available for Freightliner 114SD and Western Star 47X. 

• The DT12-V is a rugged, reliable option for construction, utility, and heavy-haul jobs. 

• Built for extreme-duty use, the DT12-VX is designed for the most demanding applications, including logging, mining, oilfield, and severe off-road conditions. 

Production of the DT12-VL is planned to begin in December 2025.