DETROIT DT12 TRANSMISSIONS - Service Manual - PDF - EcuForce Truck (2024)

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DETROIT DT12 TRANSMISSIONS – Service manual

Detroit Diesel Corporation introduces the Detroit DT12 automated manual transmission.

Combines operational ease of an automatic with the efficiency of a manual transmission, resulting in enhanced fuel economy, vehicle performance and safety

Categories DETROIT, TRUCK MANUALSTags Detroit, DT12, manual, PDF, Service, TRANSMISSIONS

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DETROIT DT12 TRANSMISSIONS - Service manual - PDF - dtctruck

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Created by potrace 1.16, written by Peter Selinger 2001-2019Installation with TeamViewer for free

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DETROIT DT12 TRANSMISSIONS – Service manual PDF

Detroit Diesel Corporation introduces the Detroit DT12 automated manual transmission.

Combines operational ease of an automatic with the efficiency of a manual transmission, resulting in enhanced fuel economy, vehicle performance and safety
Complements Detroit engines and axles to positively impact efficiency and performance
Maximizes fuel efficiency for line-haul/long haul operations
Features lightweight design, which offers additional payload because of its aluminum housing and single counter shaft
Improves slow-speed maneuvering capabilities without compromising high road speed efficiency
Provides direct- or over-drive capabilities
Combines traditional manual gearbox with high-speed, computer-controlled shift and clutch actuators that automatically and seamlessly select right shift pattern and clutch engagement for fuel economy and engine power
Creep mode simulates torque converter to improve low speed maneuverability for parking, docking, heavy traffic and other low speed situations
Includes Skip Shift, which automatically skips gears, enabling the transmission to run through lower gears faster to achieve cruising speed sooner
eCoast allows vehicle to ‘coast’ down grades with the engine operating at idle speeds while preserving vehicle momentum, maximizing fuel efficiency
Control module communicates with entire powertrain, giving transmission and engine the ability to share information and offer complimentary functions
Helical gears and geometrical optimized gear-cut optimize driver comfort by redusing noise
Pneumatic clutch and shift actuation provide faster gear shifts
Offers choice between eco- or power-mode configuration
Includes a true two-pedal system for ease of operation and a kick-down feature that improves vehicle acceleration when needed
Features Virtual Technician, a factory installed on-board diagnostics system that takes the guess work out of powertrain repair

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DETROIT DT12 TRANSMISSIONS - Service Manual - PDF - EcuForce Truck (2024)

FAQs

How much transmission fluid does a Detroit DT12 hold? ›

Detroit DT12 Specifications

Oil Capacity 10.7–15.4 qts.

Read The Full Story ›
Can I put a PTO on a DT12 transmission? ›

The Detroit DT12 Overdrive models, commonly used on Western Star 49X trucks, provide the opportunity for dual PTO usage. An adapter gear is required when using our standard 8-bolt PTOs for the bottom PTO opening. The adapters are currently available for the DT-OV, DT12-OVX, and DT12-OHE Overdrive models.

Learn More Now ›
What oil goes in a DT12 transmission? ›

Delo Syn-AMT XDT SAE 75W-90 is recommended for factory and service fill for Daimler DT-12 automated manual transmissions when operating under severe conditions and in extremely cold or hot environments. Delo Syn-AMT XDT SAE 75W-90 meets or exceeds the performance requirements of API Service Category GL-4.

Read More ›
Does DT12 transmission have a filter? ›

This transmission does not have an oil filter.

View Details ›
How long does a DT12 clutch last? ›

Exclusions: CPCA and clutch - 3 years/350,000 miles; Yokes (sealing surface only) - 3 years/300,000 miles (follows drive-train warranty).

Read The Full Story ›
How much transmission fluid do I need to fill up? ›

In general, transmissions take about 9 to 13 quarts to fill completely. The amount of transmission you add will vary, depending on whether you are draining or replacing it all or you are just topping it up. Again, you should avoid adding too much.

View Details ›
Can PTO cause transmission problems? ›

“If (the PTO is) too tight, you're going to burn the PTO drive gear up; if (it's) too loose, you're going to get a lot of noise and gear damage. Also, check if they're air or electric shift; make sure they're shifting properly.”

View Details ›
How do you engage PTO on a manual truck? ›

Push the clutch in, flip the PTO ( power takeoff) switch, engage the clutch.

Show Me More ›
How does a PTO work on a manual transmission? ›

A mechanical shift PTO is engaged by physically shifting one gear into another. This process is completed by using a lever, cable, or air pressure in most circ*mstances. These can be used as an application for automated and manual transmissions.

See Details ›
Does a dt12 transmission have a clutch? ›

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.

Learn More Now ›

What is a good transmission oil? ›

Best Overall—Valvoline MaxLife Multi-Vehicle Full Synthetic Transmission Fluid. As a fully synthetic transmission fluid that's suitable for a wide variety of vehicles, Valvoline MaxLife Multi-Vehicle Full Synthetic Automatic Transmission Fluid is our top choice.

Read On ›
What does DT12 stand for? ›

THE DETROIT DT12 IS A 12-SPEED, AUTOMATED MANUAL TRANSMISSION WITH SHORTER GEAR STEPS. THE DETROIT DT12 WAS DESIGNED WITH A NUMBER OF INNOVATIVE EFFICIENCY FEATURES TO ACHIEVE OPTIMAL FUEL ECONOMY. Oil Pump. An oil pump, powered by the countershaft, delivers oil directly to the gears.

See More ›
Who rebuilds DT12 transmissions? ›

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.

Learn More Now ›
What is the final drive ratio of a DT 12? ›

The DT12 gear ratio has increased from 15 to 19, enabling maximum down speeding to enhance fuel efficiency and low-speed maneuverability. This ratio increase also enables higher GCW ratings.

Know More ›
How much fluid does a 12 inch torque converter hold? ›

Torque Converter Fluid Capacity
Size of Converter# of Quarts
12"4
11"3.5
10"3
4 more rows

Explore More ›
How many quarts of transmission fluid does it hold? ›

How Much Transmission Fluid Do I Need in My Car?
City Car, Family Car, Sedan1.8 – 10.3 US quarts
Microcar2.5 – 6.3 US quarts
Minivan, Crossover Utility Vehicle (CUV)2 – 9.7 US quarts
Pickup, Commercial Vehicle2.2 – 12 US quarts
Sports Utility Vehicle (SUV), Subcompact Car3.5 – 17.1 US quarts
7 more rows

Get More Info Here ›
How much transmission fluid do I put in my diesel? ›

A common practice with many diesel heavy equipment owners is to add 1/4 cup of transmission fluid per 150L of diesel to keep their diesel semi's or equipments fuel pump lubricated and engine carbon free.

Know More ›

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