DT12 On-Highway Series: Automated Manual Transmissions

More Choice. Maximum Efficiency. 

The DT12® On-Highway Series of automated manual transmissions builds upon the DT12’s proven reputation to provide a trio of purpose-built solutions for on-highway applications. All three models offer:

  • Cutting-edge performance
  • Enhanced fuel efficiency
  • Ease of operation for driver comfort
Brochures & Videos

DT12 HE

Transmission

DT12-HE

DT12-H

DT12-HL

Max Input Torque (lb-ft)

2,250

2,050

1,650

Gear Ratio Range

14.56-0.78 (OD), 18.80-1.00 (DD)

11.64-0.78 (OD), 14.93 - 1.00 (DD)

11.67-0.78 (OD), 14.93 - 1.00 (DD)

GCW Limit (lbs)

160,000

140,000

80,000

Speeds

12 forward, 4 reverse

12 forward, 4 reverse

12 forward, 4 reverse

Engine Compatibility

DD13, DD15, DD16

DD13, DD15

DD13

Truck Model Availability

Freightliner Cascadia, Freightliner M2 112 Plus

Freightliner Cascadia

Freightliner Cascadia, Freightliner M2 112 Plus, Freightliner 114SD Plus

Key Feature

Designed for maximum efficiency. New design features enable further downspeeding. Increased GCW ratings and durability allow for improved on-highway capabilities.

Industry-leading AMT. Built for versatility, offering proven performance and fuel efficiency.

Built to maximize weight savings for weight-sensitive applications - up to 125 lbs lighter than the other models.

On Highway Website Update OPTION 1

Efficiency Meets Performance: The Detroit DT12 On-Highway Series

The AMT Difference

 An automated manual transmission (AMT) offers the benefits of both a manual and automatic transmission. Its design uses an efficient clutch instead of a torque converter, but the clutch and shifting are handled by a computer-controlled air system. Even a novice driver can get to work with minimal effort and fuel—and maximum productivity.

The DT12® On-Highway Series transmissions provide 12 speeds for increased efficiency and flexibility. Its two-pedal design allows the driver to focus on what’s ahead instead of what’s underfoot, increasing safety and productivity. As a bonus, seamless integration with Detroit® engines and safety systems promotes optimal performance.

Integrated Detroit Powertrain

ONLY ONE COMPANY CAN DELIVER THIS LEVEL OF INTEGRATION

The Integrated Detroit® Powertrain delivers the performance and dependability you need to run your business efficiently. Detroit has designed, engineered and manufactured the engine, transmission and axles to work together seamlessly, providing the optimal powertrain solution for your business needs. The Integrated Detroit Powertrain is available in the Freightliner Cascadia.

Integrated Detroit Powertrain

Additional Service Offerings

Detroit Connect Virtual Technician

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.

More about Detroit Connect

Extensive Parts Availability

Trained technicians are ready to serve you at any of our 800+ authorized Detroit locations across the highways and backroads of North America.

Parts & Service

Truck Model Options

DT12 on-highway series transmissions vary across a range of truck models. 

Freightliner logo. Freightliner
02 48 A5 6619 FINAL R 06SEP2024 300X300
Cascadia (Fifth Generation)
new-cascadia-300x300.jpg
Cascadia (Fourth Generation)
FTL M2 112 Plus Available Truck Model Image
M2 112 Plus
Western Star logo Western Star
47x_sf_super_dump_301x300.jpg
47X
49x-green-dump-min_301x300.jpg
49X
Find A Dealer