9G-Tronic is

Mercedes-Benz Mercedes-Benz (), commonly referred to as Mercedes and sometimes as Benz, is a German luxury and commercial vehicle automotive brand established in 1926. Mercedes-Benz AG (a Mercedes-Benz Group subsidiary established in 2019) is headquartere ...

trademark A trademark (also written trade mark or trade-mark) is a type of intellectual property consisting of a recognizable sign, design, or expression that identifies products or services from a particular source and distinguishes them from othe ...

name for its nine-speed

automatic transmission An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving ...

, starting off with the W9A 700 (Wandler-9-Gang-Automatik bis 700 Nm Eingangsdrehmoment; converter-9-gear-automatic with 516 lb-ft (700 Nm) maximum input torque; type 725.0) as core model.

Abstract

In all applications this transmission is identified as the New Automatic Gearbox Generation Three, or NAG3. Initially it debuted on the E 350 blueTEC in 2013, before launched in the

Mercedes-Benz S-Class (W222) The Mercedes-Benz W222 is the sixth generation of the S-Class produced from 2013 to 2020, the successor of the W221 S-Class and the predecessor of the W223 S-Class. The W222 was designed during 2009. The original design proposal of the car wa ...

. It has been expanded to be used in the

Mercedes-Benz C-Class (W205) The Mercedes-Benz W205 is the fourth generation of the Mercedes-Benz C-Class which was produced by Daimler AG between 2014 and 2021. The W205 C-Class was preceded by the W204 C-Class and superseded by the W206 C-Class. The fourth-generation C-C ...

and the sedan and wagon variants of the

Mercedes-Benz E-Class (W213) The W213 Mercedes-Benz E-Class is the fifth-generation of the Mercedes-Benz E-Class. Sold from 2016 (as a 2017 model), it is the successor to the W212/S212 E-Class models. The coupe/convertible models share the same platform as the sedan/wagon, i ...

. This transmission was later introduced on

Mercedes-Benz M-Class Mercedes-Benz (), commonly referred to as Mercedes and sometimes as Benz, is a German luxury and commercial vehicle automotive brand established in 1926. Mercedes-Benz AG (a Mercedes-Benz Group subsidiary established in 2019) is headquartere ...

(W166) facelift on the GLE 250 d model.

V12 engine A V12 engine is a twelve-cylinder piston engine where two banks of six cylinders are arranged in a V configuration around a common crankshaft. V12 engines are more common than V10 engines. However, they are less common than V8 engines. The f ...

models continue to use the older

Mercedes-Benz 7G-Tronic transmission 7G-Tronic is Mercedes-Benz's trademark name for its seven-speed automatic transmission, starting off with the W7A 700 and W7A 400 (Wandler-7-Gang-Automatik bis 700 oder 400 Nm Eingangsdrehmoment; converter-7-gear-automatic with 516 ...

. By the end of 2018 unsurpassed ratio span among

longitudinal Longitudinal is a geometric term of location which may refer to: * Longitude ** Line of longitude, also called a meridian * Longitudinal engine, an internal combustion engine in which the crankshaft is oriented along the long axis of the vehicl ...

s for passenger cars.

Development, production and licensing to Jatco Ltd

Development took place at the group's headquarters in Stuttgart-Untertuerkheim. Initially, the transmission was produced only at the Daimler plant not far away in Stuttgart-Hedelfingen. Since April 2016, the transmission has also been produced at Daimler's subsidiary ''Star Assembly'' in

Romanian Romanian may refer to: *anything of, from, or related to the country and nation of Romania **Romanians, an ethnic group **Romanian language, a Romance language *** Romanian dialects, variants of the Romanian language ** Romanian cuisine, tradition ...

Sebeș Sebeș (; German: ''Mühlbach''; Hungarian: ''Szászsebes''; Transylvanian Saxon dialect: ''Melnbach'') is a city in Alba County, central Romania, southern Transylvania. Geography The city lies in the Mureș River valley and straddles the rive ...

. In 2019, the

Jatco , abbreviated from "Japan Automatic Transmission COmpany", is a company that manufactures automatic transmissions for automobiles. History In August 1943, Nissan established an aircraft engine production plant in the town of Yoshiwara, Shizuoka. ...

Ltd, based in

Fuji, Shizuoka is a city in eastern Shizuoka Prefecture, Japan. , the city had an estimated population of 245,015 in 106,087 households, and a population density of 1,000 persons per km2. The total area of the city is . Fuji is the third largest city in terms o ...

, Japan, started licensed production for use in Nissan and Infiniti vehicles. In this version, input torque is limited to 700 Nm, allowing each of the gearsets 1, 2, and 4 to use only three planetary gears. Slightly modified gear dimensions give it a spread of about 9.1.

Specifications

Basic concept

Technical and economic progress is reflected in 9 forward gears out of 10 main components, compared to 7 forward gears out of 11 main components in the direct predecessor. It is fully electronic controlled.

Torque converter A torque converter is a type of fluid coupling that transfers rotating power from a prime mover, like an internal combustion engine, to a rotating driven load. In a vehicle with an automatic transmission, the torque converter connects the power ...

lock-up can operate in all 9 forward gears.

Gear ratios

Nomogram

▶️ Interactive Nomogram
br />
This

nomogram A nomogram (from Greek , "law" and , "line"), also called a nomograph, alignment chart, or abac, is a graphical calculating device, a two-dimensional diagram designed to allow the approximate graphical computation of a mathematical function ...

is a real geometric calculator exactly representing the rotational speeds of the transmission's 3x4 = 12 internal shafts for each of its 9 ratios (+ ''reverse''), grouped according to their 4 permanent coupling on 3 joint ordinates and 5 independent ordinates. These ordinates are positioned on the

abscissa In common usage, the abscissa refers to the (''x'') coordinate and the ordinate refers to the (''y'') coordinate of a standard two-dimensional graph. The distance of a point from the y-axis, scaled with the x-axis, is called abscissa or x coo ...

in strict accordance with the proportions of the sun gears' teeth numbers relative to those of their rings. Consequently, the output ratios on the 3rd ordinate (''carrier of the third planetary gearset'') follows closely those of the actual transmission. This advantageous geometric construction sets us free fro
Willis'
famous and tedious formula, because all calculations are exclusively determined by lengths ratios, respectively teeth numbers on the

for the 4 epicyclic ratios, and of rotational speeds on the 3rd ordinate for the 10 gear ratios. This nomogram reflects the version from 2013. ''Legend'':
A : Brake (blocks s2 sun gear)
B : Brake (blocks r3 ring gear)
C : Brake (blocks c1 carrier gear)
D : Clutch (couples c3 carrier gear with r4 ring gear)
E : Clutch (couples c1 carrier gear with r2 ring gear)
F : Clutch (couples s1 sun gear with c1 carrier gear)

AMG SpeedShift

AMG SpeedShift TCT

The TCT transmission is essentially the 9G-Tronic automatic transmission including "Torque Converter Technology".

AMG SpeedShift MCT

Mercedes-AMG Mercedes-AMG GmbH, commonly known as AMG, is the high-performance subsidiary of Mercedes-Benz AG. AMG independently hires engineers and contracts with manufacturers to customize Mercedes-Benz AMG vehicles. The company has its headquarters in A ...

developed the 9-speed MCT "Multi Clutch Technology" planetary

. The MCT transmission is essentially the 9G-Tronic automatic transmission without a torque converter. Instead of a torque converter, it uses a compact wet startup clutch to launch the car from a stop and also supports computer-controlled double-clutching. The MCT (Multi-Clutch Technology) acronym refers to a planetary (automatic) transmission's multiple clutches and bands for each gear. The MCT is fitted with four drive modes: “C” (Comfort), “S” (Sport), “S+” (Sport plus) and “M” (Manual) and boasts 100 millisecond shifts in "M" and "S+" modes. MCT-equipped cars are also fitted with the new AMG DRIVE UNIT with an innovative Race Start function. The AMG DRIVE UNIT is the central control unit for the AMG SPEEDSHIFT MCT 9-speed sports transmission and all driving dynamics functions. The driver can change gears either using the selector lever or by nudging the steering-wheel shift paddles. The new Race start Function is a launch control system that enables the driver to call on maximum acceleration while ensuring optimum traction of the driven wheels. The new GLC 63 4MATIC+ and GLC 63 S 4MATIC+ feature the AMG SPEEDSHIFT MCT 9-speed transmission, which made its debut in the Mercedes-AMG E 63 4MATIC+. The driver benefits from extremely short shift/response times. Fast multiple downshifts and the double-declutching function make for a highly emotive gearshift experience. A start-off wet clutch replaces the torque converter. This saves weight and optimises the response to the driver's accelerator pedal input, particularly during acceleration and load changes.

Applications

Mercedes models

Mercedes C-Class

* 2015–2021

Mercedes-Benz W205 The Mercedes-Benz W205 is the fourth generation of the Mercedes-Benz C-Class which was produced by Daimler AG between 2014 and 2021. The W205 C-Class was preceded by the W204 C-Class and superseded by the W206 C-Class. The fourth-generation C- ...

(all models) * 2022– Mercedes-Benz W206

Mercedes E-Class

* 2014–2016

Mercedes-Benz W212 The W212 and S212 Mercedes-Benz E-Class series is the fourth-generation of the E-Class range of executive cars which was produced by Mercedes-Benz between 2009 and 2016 as the successor to the W211 E-Class. The body styles of the range are: * 4 ...

(E 350 BlueTec only) available as an option to others. * 2016–present Mercedes-Benz W213 (all models)

Mercedes S-Class

* 2017–2021

Mercedes-Benz W222 The Mercedes-Benz W222 is the sixth generation of the S-Class produced from 2013 to 2020, the successor of the W221 S-Class and the predecessor of the W223 S-Class. The W222 was designed during 2009. The original design proposal of the car wa ...

(all except V12 models) * 2021– Mercedes-Benz W223

Mercedes V-Class

* 2020–present V-Class (W447) (longitudinal engines)

Mercedes GLC-Class

* 2015–present GLC

Mercedes-Benz GLE-Class

* 2016–2019 GLE (W166) (except 63 AMG & 350 models) * 2020–present GLE (W167) (except 63 models)

Mercedes-Benz GLS-Class

* 2017–2019 GLS (X166) (all except AMG) * 2020–present GLS (X167)

Mercedes-Benz SLK-Class

* 2015–2020 SLC (R172) (except 55 AMG)

Mercedes-AMG models

Mercedes-AMG SL

* 2022–present AMG SL (R232)

Jatco , abbreviated from "Japan Automatic Transmission COmpany", is a company that manufactures automatic transmissions for automobiles. History In August 1943, Nissan established an aircraft engine production plant in the town of Yoshiwara, Shizuoka. ...
Ltd model JR913E

Nissan

* 2020–

Nissan Titan The Nissan Titan is a full-size pickup truck manufactured in the United States for the North American market by Nissan. It was named for the Titans of Greek mythology. __TOC__ First generation (A60; 2003) Development of the Titan began in ...

* 2020–

Nissan Frontier The Nissan Frontier is a nameplate used on two different pickup truck models by Nissan: * Nissan Frontier (international), an alternative nameplate for the NP300/Navara on some markets * Nissan Frontier (North America), a rebadged NP300/Navara fro ...

* 2023–

Nissan Z (RZ34) The Nissan Z, known in Japan as the , is the seventh generation of the Z-car line of sports cars manufactured by Nissan. The model succeeded the 370Z, though is built on a modified and revised version of the previous generation's platform. The ...

Infiniti

Aston Martin

* 2021– Aston Martin DBX V8 and Straight-Six * 2022– Aston Martin DBX707

References

External links

Nine-Speed Automatic Transmission 9G-Tronic by Mercedes-BenzNomographs and Feasibility Graphs for Enumeration of Ravigneaux-Type Automatic Transmissions
{{DEFAULTSORT:9g-Tronic Mercedes-Benz Automatic transmission tradenames Mercedes-Benz Group transmissions

Abstract

Development, production and licensing to Jatco Ltd

Specifications

Basic concept

Gear ratios

Nomogram

AMG SpeedShift

AMG SpeedShift TCT

AMG SpeedShift MCT

Applications

Mercedes models

Mercedes C-Class

Mercedes E-Class

Mercedes S-Class

Mercedes V-Class

Mercedes GLC-Class

Mercedes-Benz GLE-Class

Mercedes-Benz GLS-Class

Mercedes-Benz SLK-Class

Mercedes-AMG models

Mercedes-AMG SL

Jatco , abbreviated from "Japan Automatic Transmission COmpany", is a company that manufactures automatic transmissions for automobiles. History In August 1943, Nissan established an aircraft engine production plant in the town of Yoshiwara, Shizuoka. ... Ltd model JR913E

Nissan

Infiniti

Aston Martin

See also

References

External links

Jatco , abbreviated from "Japan Automatic Transmission COmpany", is a company that manufactures automatic transmissions for automobiles. History In August 1943, Nissan established an aircraft engine production plant in the town of Yoshiwara, Shizuoka. ...
Ltd model JR913E