Mercedes-Benz 9G-Tronic transmission

9G-Tronic
Cutaway model of the transmission with components for hybrid drive
Overview
Manufacturer	Daimler AG Jatco Ltd
Model code	W9A 400/700/1000 · Type 725.0 9AT · JR913E (Jatco)
Production	2013–present
Body and chassis
Class	9-speed longitudinal automatic transmission
Related	ZF 8HP · Aisin-Toyota 8-speed · Ford-GM 10-speed
Chronology
Predecessor	7G-Tronic

9G-Tronic is Mercedes-Benz's trademark name for its 9-speed automatic transmission for longitudinal engines. The transmission is suitable for rear-wheel drive, all-wheel drive, hybrid, and plug-in hybrid drives and has been gradually introduced in most model series, ^[1] starting off with the W9A 700 converter-9-gear-automatic with 700  N⋅m (516  lb⋅ft ) maximum input torque (German : Wandler-9-Gang-Automatik bis 700 N⋅m Eingangsdrehmoment • type 725.0 ^{[1] [2]} ) as core model. The transmission was used in the E 350 BlueTEC in 2013 for the first time, ^[1] and successively replaced both the 7-speed 7G-Tronic (PLUS) transmission and the 5-speed 5G-Tronic transmission. It includes versions for a maximum input torque of 1,000  N⋅m (738  lb⋅ft ). ^[3]

After the 5G- and 7G-Tronic, this is the 3rd generation of modern automatic transmissions, internally identified as NAG 3 (New Automatic Gearbox Generation 3). ^[4]

The Jatco 9AT transmission is based on the same globally patented gearset concept.

Gear Ratios ^[a]

Model	Type	First Deliv- ery	Gear										Total Span			Avg. Step	Components		Nomenclature
			R	1	2	3	4	5	6	7	8	9	Nomi- nal	Effec- tive	Cen- ter		Total	per Gear [b]	Cou- pling	Gears Count	Ver- sion	Maximum Input Torque
W9A 400 W9A 500 W9A 700 W9A 900	725.0 NAG 3 [c]	2013	−4.932	5.503	3.333	2.315	1.661	1.211	1.000	0.865	0.717	0.601	9.150	8.199	1.819	1.319	4 Gearsets 3 Brakes 3 Clutches	1.111	W [d]	9 [b]	A	400  N⋅m (295  lb⋅ft ) [5] 500  N⋅m (369  lb⋅ft ) [5] 700  N⋅m (516  lb⋅ft ) [2] 1,000  N⋅m (738  lb⋅ft ) [3]
W9A 400 W9A 500 W9A 700 W9A 900		2016	−4.798	5.354	3.243	2.252	1.636	1.211	1.000	0.865	0.717	0.601	8.902	7.977	1.795	1.314						400  N⋅m (295  lb⋅ft ) [5] 500  N⋅m (369  lb⋅ft ) [5] 700  N⋅m (516  lb⋅ft ) [2] 1,000  N⋅m (738  lb⋅ft ) [3]
9AT	JR913E	2019	−4.799	5.425	3.263	2.250	1.649	1.221	1.000	0.862	0.713	0.597	9.091	8.042	1.799	1.318				9 [b]		700  N⋅m (516  lb⋅ft ) [A]
Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage Forward gears only 3rd generation of advanced automatic transmissions with a combined parallel and serially coupled gearset concept for more gears and improved economy, at Mercedes-Benz referred to as NAG 3 (New Automatic Gearbox Generation 3 · German: Neue Automatikgetriebe-Generation 3) [4] Torque converter · German: Wandler or Drehmomentwandler

Development and production

Development took place at the group's headquarters in Stuttgart-Untertuerkheim. ^[1] Initially, the transmission was produced only at the Daimler plant not far away in Stuttgart-Hedelfingen. ^[4] Since April 2016, the transmission has also been produced at Daimler's subsidiary Star Assembly in Sebeș, Romania. ^[7]

Licensing to Jatco Ltd

In 2019, the Jatco Ltd, based in Fuji, Shizuoka, Japan, started licensed production for use in Nissan and Infiniti vehicles. ^{[8] [9]} In this version, input torque is limited to 700  N⋅m (516  lb⋅ft ), ^[A] allowing each of the gearsets 1, 2, and 4 to use only three planetary gears. ^[B] Slightly modified gear dimensions give it a span of just under 9.1:1.

Specifications

Technical Data

Type	725.0			JR913E
Model	W9A 400/500	W9A 700	W9A 900	9AT
Input Capacity
Maximum engine power
Maximum engine torque	400  N⋅m (295  lb⋅ft ) [5] 500  N⋅m (369  lb⋅ft ) [5]	700  N⋅m (516  lb⋅ft ) [2]	1,000  N⋅m (738  lb⋅ft ) [3]	700  N⋅m (516  lb⋅ft ) [A]
Maximum shaft speed	1st to 7th: 7,000/min [2]
	8th: 5,900/min [2]
	9th: 5,000/min [2]
Sundry
Torque converter lock-up	with torsional + pendulum [2] [10] [A] · can operate in all 9 forward gears
Torque converter size				260  mm (10.24  in ) [A]
Length	Overall: 644  mm (25.35  in ) to 649  mm (25.55  in ) [a]			Gearbox only: 439.5  mm (17.30  in ) [A]
Fluid capacity	10.0  L (10.6  US qt ) [2]
Weight [b]		94.8  kg (209  lb ) [2]		99.5  kg (219  lb ) [A]
depending on joint flange and torque converters [2] including torque converter and automatic transmission fluid

Torque converter

One main focus was on increasing shift comfort, which is achieved on the one hand by measures in the control system and on the other hand by designing the torque converter accordingly. The hydrodynamic torque converter was largely taken over from the previous 7G-Tronic transmission.

Control system

The 9G-Tronic is fully electronically controlled. The shift elements are controlled via a new type of hydraulic direct control with electromagnetically actuated valves, which enables fast and smooth gear changes. Compared to the previous transmission, which had a hydraulic pilot control, leakage losses have been reduced by 80%. ^[10]

Oil supply

The transmission is equipped with two oil pumps to ensure an energy-efficient supply of long-life synthetic fuel-economy low-friction oil: a mechanical rotary vane pump with chain drive, which is significantly smaller than its predecessor and located next to the main shaft, and a pump driven by a brushless electric DC motor. ^[10] The mechanically driven pump is responsible for the basic supply of the transmission, with the flow rate depending on the speed of the drive motor. The additional pump is switched on by the electronic transmission control unit as required. This design enables the lubricating and cooling oil volume flow to be regulated as required and makes the 9G-Tronic start/stop-capable. ^[1] When the drive motor is at a standstill, the transmission remains ready to start solely due to the supply from the electric auxiliary pump.

Filter elements for the two pumps are integrated in the plastic oil pan.

AMG SpeedShift 9G

AMG SpeedShift TCT 9G

The TCT 9G (Torque Converter Technology) transmission is essentially the 9G-Tronic.

AMG SpeedShift MCT 9G

Mercedes-AMG developed the MCT 9G (Multi Clutch Technology) transmission. It was first introduced in the Mercedes-AMG E 63 4Matic+.

The MCT transmission is essentially the 9G-Tronic with a start-off wet clutch (German : NAK for Nass-Anfahrkupplung) replacing the torque converter. This saves weight and optimises the response to the accelerator pedal input. It is a computer-controlled double-clutching. ^[11] The MCT acronym refers to this multiple-plate clutch. Its torque is rated at 900  N⋅m (664  lb⋅ft ) and it offers 4 drive modes: “C” (Comfort), “S” (Sport), “S+” (Sport plus) and “M” (Manual) and boasts 0.1 second shifts in “M” and “S+” modes. MCT-equipped cars are also fitted with the new AMG Drive Unit as the central control unit for all driving dynamics functions and an innovative Race Start Function.

The driver can change gears either using the steering-wheel shift paddles or conventionally the selector lever. The new Race Start Function is a launch control system that enables maximum acceleration while ensuring optimum traction of the driven wheels.

Combined Parallel And Serially Coupled Gearset Concept For More Gears And Improved Cost-Effectiveness

Main Objectives

The main objectives in replacing the previous 7G-Tronic model were to improve fuel consumption by adding gears and increasing the gear span, while at the same time reducing manufacturing costs.

The wide gear span ^[a] allows the engine speed level to be lowered (downspeeding), which is a decisive factor in improving energy efficiency and thus reducing fuel consumption by 6.5 %. ^[10] In addition, the lower engine speed level improves the noise-vibration-harshness comfort and the exterior noise is reduced by up to 4 dB(A). ^[1] A speed of 120 km/h is reached in the Mercedes-Benz E 350 BlueTEC in 9th gear at an engine speed of approx. 1350 rpm. ^[13] Unsurpassed ratio span among longitudinal automatic transmissions for passenger cars. ^[b]

Extent

As the design of the predecessor was significantly more complex than that of the direct competitor 6HP and even the new 8HP model from ZF with one more gear, the specification sheet also stipulate that at least one shift element must be omitted. This was achieved thanks to high-speed computer-aided design and has resulted in a globally patented gearset concept that requires the same installation space as the previous model and is also 1  kg (2.2  lb ) lighter. ^[3] In the process, 85 billion gearset concepts were examined. ^[14] Additionally, the unit brings the ability to shift in a non-sequential manner – going from gear 9 to gear 4 in extreme situations simply by changing one shift element (actuating brake C and releasing brake A).

After the 5G- and 7G-Tronic, this transmission is the 3rd generation ^[4] in which in-line epicyclic gearing have been combined with parallel epicyclic gearing. The resulting progress is reflected in an even better ratio between the number of gears and the number of components used compared to all layouts previously used by Mercedes-Benz.

Gearset Concept: Cost-Effectiveness ^[c]

With Assessment	Output: Gear Ratios	Innovation Elasticity [d] Δ Output : Δ Input	Input: Main Components
			Total	Gearsets	Brakes	Clutches
W9A Ref. Object	${\displaystyle n_{O1}}$ ${\displaystyle n_{O2}}$	Topic [d]	${\displaystyle n_{I}=n_{G}+}$ ${\displaystyle n_{B}+n_{C}}$	${\displaystyle n_{G1}}$ ${\displaystyle n_{G2}}$	${\displaystyle n_{B1}}$ ${\displaystyle n_{B2}}$	${\displaystyle n_{C1}}$ ${\displaystyle n_{C2}}$
Δ Number	${\displaystyle n_{O1}-n_{O2}}$		${\displaystyle n_{I1}-n_{I2}}$	${\displaystyle n_{G1}-n_{G2}}$	${\displaystyle n_{B1}-n_{B2}}$	${\displaystyle n_{C1}-n_{C2}}$
Relative Δ	Δ Output ${\displaystyle {\tfrac {n_{O1}-n_{O2}}{n_{O2}}}}$	${\displaystyle {\tfrac {n_{O1}-n_{O2}}{n_{O2}}}:{\tfrac {n_{I1}-n_{I2}}{n_{I2}}}}$ ${\displaystyle ={\tfrac {n_{O1}-n_{O2}}{n_{O2}}}\cdot {\tfrac {n_{I2}}{n_{I1}-n_{I2}}}}$	Δ Input ${\displaystyle {\tfrac {n_{I1}-n_{I2}}{n_{I2}}}}$	${\displaystyle {\tfrac {n_{G1}-n_{G2}}{n_{G2}}}}$	${\displaystyle {\tfrac {n_{B1}-n_{B2}}{n_{B2}}}}$	${\displaystyle {\tfrac {n_{C1}-n_{C2}}{n_{C2}}}}$
W9A W7A [e]	9 [f] 7 [g]	Progress Mercedes-Benz [d]	10 11 [15]	4 4 [h]	3 4	3 3
Δ Number	2		-1	0	-1	0
Relative Δ	0.286 ${\displaystyle {\tfrac {2}{7}}}$	−3.143 [d] ${\displaystyle {\tfrac {2}{7}}:{\tfrac {-1}{11}}={\tfrac {2}{7}}\cdot {\tfrac {-11}{1}}={\tfrac {-22}{7}}}$	−0.091 ${\displaystyle {\tfrac {-1}{11}}}$	0.000 ${\displaystyle {\tfrac {0}{4}}}$	−0.250 ${\displaystyle {\tfrac {-1}{4}}}$	0.000 ${\displaystyle {\tfrac {0}{3}}}$
9AT 7AT [e]	9 [f] 7 [f]	Progress Jatco [d]	10 11	4 4	3 4	3 3
Δ Number	2		-1	0	-1	0
Relative Δ	0.286 ${\displaystyle {\tfrac {2}{7}}}$	−3.143 [d] ${\displaystyle {\tfrac {2}{7}}:{\tfrac {-1}{11}}={\tfrac {2}{7}}\cdot {\tfrac {-11}{1}}={\tfrac {-22}{7}}}$	−0.091 ${\displaystyle {\tfrac {-1}{11}}}$	0.000 ${\displaystyle {\tfrac {0}{4}}}$	−0.250 ${\displaystyle {\tfrac {-1}{4}}}$	0.000 ${\displaystyle {\tfrac {0}{3}}}$
W9A & 9AT 8HP [i]	9 [f] 8 [f]	Current Market Position [d]	10 9	4 4	3 2	3 3
Δ Number	1		1	0	1	0
Relative Δ	0.125 ${\displaystyle {\tfrac {1}{8}}}$	1.125 [d] ${\displaystyle {\tfrac {1}{8}}:{\tfrac {1}{9}}={\tfrac {1}{8}}\cdot {\tfrac {9}{1}}={\tfrac {9}{8}}}$	0.111 ${\displaystyle {\tfrac {1}{9}}}$	0.000 ${\displaystyle {\tfrac {0}{4}}}$	0.500 ${\displaystyle {\tfrac {1}{2}}}$	0.000 ${\displaystyle {\tfrac {0}{3}}}$
W9A & 9AT 3-Speed [j]	9 [f] 3 [f]	Historical Market Position [d]	10 7	4 2	3 3	3 2
Δ Number	6		3	2	0	1
Relative Δ	2.000 ${\displaystyle {\tfrac {6}{3}}}$	4.667 [d] ${\displaystyle {\tfrac {6}{3}}:{\tfrac {3}{7}}={\tfrac {2}{1}}\cdot {\tfrac {7}{3}}={\tfrac {14}{3}}}$	0.429 ${\displaystyle {\tfrac {3}{7}}}$	1.000 ${\displaystyle {\tfrac {1}{1}}}$	0.000 ${\displaystyle {\tfrac {0}{3}}}$	0.500 ${\displaystyle {\tfrac {1}{2}}}$
First version with a gear ratio span wider than 9.1:1. [12] Was replaced by a slightly more narrowly stepped 2nd version with the introduction of the Mercedes-Benz E-Class (W213) series in 2016 without announcement By the end of 2024 Progress increases cost-effectiveness and is reflected in the ratio of forward gears to main components. It depends on the power flow: parallel: using the two degrees of freedom of planetary gearsets to increase the number of gears with unchanged number of components serial: in-line combined planetary gearsets without using the two degrees of freedom to increase the number of gears a corresponding increase in the number of components is unavoidable Innovation Elasticity Classifies Progress And Market Position Automobile manufacturers drive forward technical developments primarily in order to remain competitive or to achieve or defend technological leadership. This technical progress has therefore always been subject to economic constraints Only innovations whose relative additional benefit is greater than the relative additional resource input, i.e. whose economic elasticity is greater than 1, are considered for realization The required innovation elasticity of an automobile manufacturer depends on its expected return on investment. The basic assumption that the relative additional benefit must be at least twice as high as the relative additional resource input helps with orientation negative, if the output increases and the input decreases, is perfect 2 or above is good 1 or above is acceptable (red) below this is unsatisfactory (bold) Direct Predecessor To reflect the progress of the specific model change plus 1 reverse gear plus 2 reverse gears of which 2 gearsets are combined as a compound Ravigneaux gearset Current Reference Standard (Benchmark) The 8HP has become the new reference standard (benchmark) for automatic transmissions Historical Reference Standard (Benchmark) 3-speed transmissions with torque converters have established the modern market for automatic transmissions and thus made it possible in the first place, as this design proved to be a particularly successful compromise between cost and performance It became the archetype and dominated the world market for around 3 decades, setting the standard for automatic transmissions. It was only when fuel consumption became the focus of interest that this design reached its limits, which is why it has now completely disappeared from the market What has remained is the orientation that it offers as a reference standard (point of reference, benchmark) for this market for determining progressiveness and thus the market position of all other, later designs All transmission variants consist of 7 main components Typical examples are Turbo-Hydramatic from GM Cruise-O-Matic from Ford TorqueFlite from Chrysler Detroit Gear from BorgWarner for Studebaker BW-35 from BorgWarner and as T35 from Aisin 3N 71 from Nissan/Jatco 3 HP from ZF Friedrichshafen W3A 040 and W3B 050 from Mercedes-Benz

Gearset Concept: Quality

The ratios of the 9 gears are better distributed in all versions than in the direct competitors 8HP from ZF and much better than in the 10-speed transmissions from Ford/GM and Aisin/Toyota. The only noticeable weaknesses are the relatively small step between 5th and 6th gear and the too small one between 6th and 7th gear. These cannot be eliminated without affecting all other gears and thus impairing gear steps. On the other hand, these weaknesses are not overly significant.

All in all

• the extra effort, reflected in the acceptable elasticity compared to the ZF 8HP is more than justified and
• compared to the 10-speed gearboxes from Ford/GM and Aisin/Toyota, the absence of the 10th gear is more than compensated for by the significantly better distribution.

Gear Ratio Analysis ^[a]

In-Depth Analysis [b] With Assessment And Torque Ratio [c] And Efficiency Calculation [d]			Weight	Planetary Gearset: Teeth [e]				Count	Nomi- nal [f] Effec- tive [g]	Cen- ter [h]
				Simpson		Simple [i]				Avg. [j]
Model Type	Version First Delivery		with Con- verter + Oil	S1 [k] R1 [l]	S2 [m] R2 [n]	S3 [o] R3 [p]	S4 [q] R4 [r]	Brakes Clutches	Ratio Span	Gear Step [s]
Gear Ratio [b]	R ${\displaystyle {i_{R}}}$ [b]	1 ${\displaystyle {i_{1}}}$ [b]	2 ${\displaystyle {i_{2}}}$ [b]	3 ${\displaystyle {i_{3}}}$ [b]	4 ${\displaystyle {i_{4}}}$ [b]	5 ${\displaystyle {i_{5}}}$ [b]	6 ${\displaystyle {i_{6}}}$ [b]	7 ${\displaystyle {i_{7}}}$ [b]	8 ${\displaystyle {i_{8}}}$ [b]	9 ${\displaystyle {i_{9}}}$ [b]
Step [s]	${\displaystyle -{\frac {i_{R}}{i_{1}}}}$ [t]	${\displaystyle {\frac {i_{1}}{i_{1}}}}$	${\displaystyle {\frac {i_{1}}{i_{2}}}}$ [u]	${\displaystyle {\frac {i_{2}}{i_{3}}}}$	${\displaystyle {\frac {i_{3}}{i_{4}}}}$	${\displaystyle {\frac {i_{4}}{i_{5}}}}$	${\displaystyle {\frac {i_{5}}{i_{6}}}}$	${\displaystyle {\frac {i_{6}}{i_{7}}}}$	${\displaystyle {\frac {i_{7}}{i_{8}}}}$	${\displaystyle {\frac {i_{8}}{i_{9}}}}$
Δ Step [v] [w]			${\displaystyle {\tfrac {i_{1}}{i_{2}}}:{\tfrac {i_{2}}{i_{3}}}}$	${\displaystyle {\tfrac {i_{2}}{i_{3}}}:{\tfrac {i_{3}}{i_{4}}}}$	${\displaystyle {\tfrac {i_{3}}{i_{4}}}:{\tfrac {i_{4}}{i_{5}}}}$	${\displaystyle {\tfrac {i_{4}}{i_{5}}}:{\tfrac {i_{5}}{i_{6}}}}$	${\displaystyle {\tfrac {i_{5}}{i_{6}}}:{\tfrac {i_{6}}{i_{7}}}}$	${\displaystyle {\tfrac {i_{6}}{i_{7}}}:{\tfrac {i_{7}}{i_{8}}}}$	${\displaystyle {\tfrac {i_{7}}{i_{8}}}:{\tfrac {i_{8}}{i_{9}}}}$
Shaft Speed	${\displaystyle {\frac {i_{1}}{i_{R}}}}$	${\displaystyle {\frac {i_{1}}{i_{1}}}}$	${\displaystyle {\frac {i_{1}}{i_{2}}}}$	${\displaystyle {\frac {i_{1}}{i_{3}}}}$	${\displaystyle {\frac {i_{1}}{i_{4}}}}$	${\displaystyle {\frac {i_{1}}{i_{5}}}}$	${\displaystyle {\frac {i_{1}}{i_{6}}}}$	${\displaystyle {\frac {i_{1}}{i_{7}}}}$	${\displaystyle {\frac {i_{1}}{i_{8}}}}$	${\displaystyle {\frac {i_{1}}{i_{9}}}}$
Δ Shaft Speed [x]	${\displaystyle 0-{\tfrac {i_{1}}{i_{R}}}}$	${\displaystyle {\tfrac {i_{1}}{i_{1}}}-0}$	${\displaystyle {\tfrac {i_{1}}{i_{2}}}-{\tfrac {i_{1}}{i_{1}}}}$	${\displaystyle {\tfrac {i_{1}}{i_{3}}}-{\tfrac {i_{1}}{i_{2}}}}$	${\displaystyle {\tfrac {i_{1}}{i_{4}}}-{\tfrac {i_{1}}{i_{3}}}}$	${\displaystyle {\tfrac {i_{1}}{i_{5}}}-{\tfrac {i_{1}}{i_{4}}}}$	${\displaystyle {\tfrac {i_{1}}{i_{6}}}-{\tfrac {i_{1}}{i_{5}}}}$	${\displaystyle {\tfrac {i_{1}}{i_{7}}}-{\tfrac {i_{1}}{i_{6}}}}$	${\displaystyle {\tfrac {i_{1}}{i_{8}}}-{\tfrac {i_{1}}{i_{7}}}}$	${\displaystyle {\tfrac {i_{1}}{i_{9}}}-{\tfrac {i_{1}}{i_{8}}}}$
Torque Ratio [c]	${\displaystyle \mu _{R}}$ [c]	${\displaystyle \mu _{1}}$ [c]	${\displaystyle \mu _{2}}$ [c]	${\displaystyle \mu _{3}}$ [c]	${\displaystyle \mu _{4}}$ [c]	${\displaystyle \mu _{5}}$ [c]	${\displaystyle \mu _{6}}$ [c]	${\displaystyle \mu _{7}}$ [c]	${\displaystyle \mu _{8}}$ [c]	${\displaystyle \mu _{9}}$ [c]
Efficiency ${\displaystyle \eta _{n}}$ [d]	${\displaystyle {\frac {\mu _{R}}{i_{R}}}}$ [d]	${\displaystyle {\frac {\mu _{1}}{i_{1}}}}$ [d]	${\displaystyle {\frac {\mu _{2}}{i_{2}}}}$ [d]	${\displaystyle {\frac {\mu _{3}}{i_{3}}}}$ [d]	${\displaystyle {\frac {\mu _{4}}{i_{4}}}}$ [d]	${\displaystyle {\frac {\mu _{5}}{i_{5}}}}$ [d]	${\displaystyle {\frac {\mu _{6}}{i_{6}}}}$ [d]	${\displaystyle {\frac {\mu _{7}}{i_{7}}}}$ [d]	${\displaystyle {\frac {\mu _{8}}{i_{8}}}}$ [d]	${\displaystyle {\frac {\mu _{9}}{i_{9}}}}$ [d]
W9A 400 W9A 500 W9A 700 W9A 900 725.0	400  N⋅m (295  lb⋅ft ) [5] 500  N⋅m (369  lb⋅ft ) [5] 700  N⋅m (516  lb⋅ft ) [2] 1,000  N⋅m (738  lb⋅ft ) [3] 2013 [y]		94.8  kg (209  lb ) [2]	46 98	44 100	36 84	34 86	3 3	9.1495 8.1991 [g] [t]	1.8194
										1.3188 [s]
Gear Ratio [b]	−4.9316 [t] [g] ${\displaystyle -{\tfrac {6,125}{1,242}}}$	5.5032 ${\displaystyle {\tfrac {6,835}{1,242}}}$	3.3333 ${\displaystyle {\tfrac {10}{3}}}$	2.3148 ${\displaystyle {\tfrac {125}{54}}}$	1.6611 [w] ${\displaystyle {\tfrac {299}{180}}}$	1.2106 ${\displaystyle {\tfrac {1,075}{888}}}$	1.0000 [x] ${\displaystyle {\tfrac {1}{1}}}$	0.8651 [w] [x] ${\displaystyle {\tfrac {58,781}{67,944}}}$	0.7167 ${\displaystyle {\tfrac {43}{60}}}$	0.6015 ${\displaystyle {\tfrac {52,675}{87,576}}}$
Step	0.8961 [t]	1.0000	1.6510	1.4400	1.3935	1.3722	1.2106	1.1559	1.2072	1.1915
Δ Step [v]			1.1465	1.0333	1.0156 [w]	1.1335	1.0473	0.9575 [w]	1.0131
Speed	-1.1159	1.0000	1.6510	2.3774	3.3130	4.5459	5.5032	6.3611	7.6789	9.1495
Δ Speed	1.1159	1.0000	0.6510	0.7264	0.9356	1.2329	0.9573 [x]	0.8579 [x]	1.3178	1.4706
Torque Ratio [c]	–4.7357 –4.6393	5.3541 5.2806	3.2867 3.2633	2.2683 2.2450	1.6385 1.6274	1.2006 1.1957	1.0000	0.8603 0.8578	0.7125 0.7104	0.5940 0.5902
Efficiency ${\displaystyle \eta _{n}}$ [d]	0.9605 0.9407	0.9730 0.9595	0.9861 0.9790	0.9800 0.9698	0.9865 0.9797	0.9918 0.9877	1.0000	0.9944 0.9915	0.9943 0.9913	0.9877 0.9813
W9A 400 W9A 500 W9A 700 W9A 900 725.0	400  N⋅m (295  lb⋅ft ) [5] 500  N⋅m (369  lb⋅ft ) [5] 700  N⋅m (516  lb⋅ft ) [2] 1,000  N⋅m (738  lb⋅ft ) [3] 2016 [y]		94.8  kg (209  lb ) [2]	46 98	44 100	37 83	34 86	3 3	8.9022 7.9775 [g] [t]	1.7946
										1.3143 [s]
Gear Ratio [b]	−4.7983 [t] [g] ${\displaystyle -{\tfrac {12,250}{2,553}}}$	5.3545 ${\displaystyle {\tfrac {13,670}{2,553}}}$	3.2432 ${\displaystyle {\tfrac {120}{37}}}$	2.2523 ${\displaystyle {\tfrac {250}{111}}}$	1.6356 [w] ${\displaystyle {\tfrac {3,631}{2,220}}}$	1.2106 ${\displaystyle {\tfrac {1,075}{888}}}$	1.0000 [x] ${\displaystyle {\tfrac {1}{1}}}$	0.8651 [w] [x] ${\displaystyle {\tfrac {58,781}{67,944}}}$	0.7167 ${\displaystyle {\tfrac {43}{60}}}$	0.6015 ${\displaystyle {\tfrac {52,675}{87,576}}}$
Step	0.8961 [t]	1.0000	1.6510	1.4400	1.3770	1.3511	1.2106	1.1559	1.2072	1.1915
Δ Step [v]			1.1465	1.0457	1.0192 [w]	1.1160	1.0473	0.9575 [w]	1.0131
Speed	-1.1159	1.0000	1.6510	2.3774	3.2737	4.4231	5.3545	6.1892	7.4714	8.9022
Δ Speed	1.1159	1.0000	0.6510	0.7264	0.8964	1.1493	0.9314 [x]	0.8347 [x]	1.2822	1.4308
Torque Ratio [c]	–4.6085 –4.5151	5.2103 5.1392	3.1984 3.1759	2.2073 2.1849	1.6139 1.6031	1.2006 1.1957	1.0000	0.8603 0.8578	0.7125 0.7104	0.5940 0.5902
Efficiency ${\displaystyle \eta _{n}}$ [d]	0.9606 0.9410	0.9732 0.9598	0.9862 0.9793	0.9802 0.9701	0.9868 0.9802	0.9918 0.9877	1.0000	0.9944 0.9915	0.9943 0.9913	0.9877 0.9813
Jatco 9AT JR913E	700  N⋅m (516  lb⋅ft ) [A] 2019 [z]		99.5  kg (219  lb ) [A]	45 96	41 91	38 86	37 92	3 3	9.0910 8.0416 [g] [t]	1.7994
										1.3177 [s]
Gear Ratio [b]	−4.7991 [t] [g] ${\displaystyle -{\tfrac {45,136}{9,405}}}$	5.4254 ${\displaystyle {\tfrac {51,026}{9,405}}}$	3.2632 ${\displaystyle {\tfrac {62}{19}}}$	2.2496 ${\displaystyle {\tfrac {2,821}{1,254}}}$	1.6491 [w] ${\displaystyle {\tfrac {94}{57}}}$	1.2213 ${\displaystyle {\tfrac {8,372}{6,855}}}$	1.0000 [x] ${\displaystyle {\tfrac {1}{1}}}$	0.8619 [w] [x] ${\displaystyle {\tfrac {18,929}{21,963}}}$	0.7132 ${\displaystyle {\tfrac {92}{129}}}$	0.5968 ${\displaystyle {\tfrac {66,976}{112,227}}}$
Step	0.8846 [t]	1.0000	1.6626	1.4505	1.3641	1.3503	1.2213	1.1603	1.2085	1.1950
Δ Step [v]			1.1462	1.0634	1.0102 [w]	1.1056	1.0526	0.9601 [w]	1.0113
Speed	-1.1305	1.0000	1.6626	2.4117	3.2899	4.4423	5.4254	6.2950	7.6074	9.0910
Δ Speed	1.1305	1.0000	0.6626	0.7491	0.8782	1.1525	0.9831 [x]	0.8696 [x]	1.3124	1.4836
Torque Ratio [c]	–4.6087 –4.5149	5.2785 5.2061	3.2179 3.1953	2.2044 2.1818	1.6270 1.6161	1.2107 1.2055	1.0000	0.8570 0.8544	0.7090 0.7069	0.5893 0.5855
Efficiency ${\displaystyle \eta _{n}}$ [d]	0.9605 0.9408	0.9731 0.9596	0.9862 0.9792	0.9800 0.9699	0.9867 0.9800	0.9914 0.9871	1.0000	0.9943 0.9914	0.9942 0.9912	0.9875 0.9810
Actuated Shift Elements [aa]
Brake A [ab]	❶								❶	❶
Brake B [ac]	❶	❶		❶	(❶) [ad]	❶		❶		❶
Brake C [ae]	❶	❶	❶	❶	❶ [i]
Clutch D [af]			❶	❶		❶	❶
Clutch E [ag]		❶	❶				❶	❶	❶
Clutch F [ah]					❶ [i]	❶	❶	❶	❶	❶
Geometric Ratios: Speed Conversion
Gear Ratio [b] R–2 Ordinary [ai] Elementary Noted [aj]	${\displaystyle i_{R}=-{\frac {R_{1}R_{2}(S_{3}+R_{3})}{S_{1}(S_{2}+R_{2})S_{3}}}}$			${\displaystyle i_{1}={\frac {(S_{1}(S_{2}+R_{2})+R_{1}S_{2})(S_{3}+R_{3})}{S_{1}(S_{2}+R_{2})S_{3}}}}$				${\displaystyle i_{2}={\frac {S_{3}+R_{3}}{S_{3}}}}$
	${\displaystyle i_{R}=-{\tfrac {{\tfrac {R_{1}}{S_{1}}}\left(1+{\tfrac {R_{3}}{S_{3}}}\right)}{1+{\tfrac {S_{2}}{R_{2}}}}}}$			${\displaystyle i_{1}=\left(1+{\tfrac {\tfrac {R_{1}}{S_{1}}}{1+{\tfrac {R_{2}}{S_{2}}}}}\right)\left(1+{\tfrac {R_{3}}{S_{3}}}\right)}$				${\displaystyle i_{2}=1+{\tfrac {R_{3}}{S_{3}}}}$
Gear Ratio [b] 3–6 Ordinary [ai] Elementary Noted [aj]	${\displaystyle i_{3}={\frac {R_{2}(S_{3}+R_{3})}{(S_{2}+R_{2})S_{3}}}}$			${\displaystyle i_{4}={\frac {S_{3}(S_{4}+R_{4})+R_{3}S_{4}}{S_{3}(S_{4}+R_{4})}}}$ [i]			${\displaystyle i_{5}={\frac {R_{2}R_{4}}{R_{2}R_{4}-S_{2}S_{4}}}}$			${\displaystyle i_{6}={\frac {1}{1}}}$
	${\displaystyle i_{3}={\tfrac {1+{\tfrac {R_{3}}{S_{3}}}}{1+{\tfrac {S_{2}}{R_{2}}}}}}$			${\displaystyle i_{4}=1+{\tfrac {\tfrac {R_{3}}{S_{3}}}{1+{\tfrac {R_{4}}{S_{4}}}}}}$			${\displaystyle i_{5}={\tfrac {1}{1-{\tfrac {S_{2}S_{4}}{R_{2}R_{4}}}}}}$
Gear Ratio [b] 7–9 Ordinary [ai] Elementary Noted [aj]	${\displaystyle i_{7}={\frac {R_{4}(S_{1}(S_{2}+R_{2})+R_{1}S_{2})}{S_{1}R_{4}(S_{2}+R_{2})+R_{1}S_{2}(S_{4}+R_{4})}}}$				${\displaystyle i_{8}={\frac {R_{4}}{S_{4}+R_{4}}}}$		${\displaystyle i_{9}={\frac {R_{1}R_{2}R_{4}}{S_{1}S_{4}(S_{2}+R_{2})+R_{1}R_{2}(S_{4}+R_{4})}}}$
	${\displaystyle i_{7}={\tfrac {1}{1+{\tfrac {\tfrac {S_{4}}{R_{4}}}{1+{\tfrac {S_{1}}{R_{1}}}\left(1+{\tfrac {R_{2}}{S_{2}}}\right)}}}}}$			${\displaystyle i_{8}={\tfrac {1}{1+{\tfrac {S_{4}}{R_{4}}}}}}$			${\displaystyle i_{9}={\tfrac {1}{1+{\tfrac {S_{4}}{R_{4}}}\left(1+{\tfrac {S_{1}}{R_{1}}}\left(1+{\tfrac {S_{2}}{R_{2}}}\right)\right)}}}$
Kinetic Ratios: Torque Conversion
Torque Ratio [c] R–2	${\displaystyle \mu _{R}=-{\tfrac {{\tfrac {R_{1}}{S_{1}}}\eta _{0}\left(1+{\tfrac {R_{3}}{S_{3}}}\eta _{0}\right)}{1+{\tfrac {S_{2}}{R_{2}}}\cdot {\tfrac {1}{\eta _{0}}}}}}$			${\displaystyle \mu _{1}=\left(1+{\tfrac {{\tfrac {R_{1}}{S_{1}}}\eta _{0}}{1+{\tfrac {R_{2}}{S_{2}}}\cdot {\tfrac {1}{\eta _{0}}}}}\right)\left(1+{\tfrac {R_{3}}{S_{3}}}\eta _{0}\right)}$				${\displaystyle \mu _{2}=1+{\tfrac {R_{3}}{S_{3}}}\eta _{0}}$
Torque Ratio [c] 3–6	${\displaystyle \mu _{3}={\tfrac {1+{\tfrac {R_{3}}{S_{3}}}\eta _{0}}{1+{\tfrac {S_{2}}{R_{2}}}\cdot {\tfrac {1}{\eta _{0}}}}}}$			${\displaystyle \mu _{4}=1+{\tfrac {{\tfrac {R_{3}}{S_{3}}}\eta _{0}}{1+{\tfrac {R_{4}}{S_{4}}}\cdot {\tfrac {1}{\eta _{0}}}}}}$			${\displaystyle \mu _{5}={\tfrac {1}{1-{\tfrac {S_{2}S_{4}}{R_{2}R_{4}}}{\eta _{0}}^{2}}}}$			${\displaystyle \mu _{6}={\tfrac {1}{1}}}$
Torque Ratio [c] 7–9	${\displaystyle \mu _{7}={\tfrac {1}{1+{\tfrac {{\tfrac {S_{4}}{R_{4}}}\cdot {\tfrac {1}{\eta _{0}}}}{1+{\tfrac {S_{1}}{R_{1}}}\eta _{0}\left(1+{\tfrac {R_{2}}{S_{2}}}\eta _{0}\right)}}}}}$			${\displaystyle \mu _{8}={\tfrac {1}{1+{\tfrac {S_{4}}{R_{4}}}\cdot {\tfrac {1}{\eta _{0}}}}}}$			${\displaystyle \mu _{9}={\tfrac {1}{1+{\tfrac {S_{4}}{R_{4}}}\cdot {\tfrac {1}{\eta _{0}}}\left(1+{\tfrac {S_{1}}{R_{1}}}\cdot {\tfrac {1}{\eta _{0}}}\left(1+{\tfrac {S_{2}}{R_{2}}}\cdot {\tfrac {1}{\eta _{0}}}\right)\right)}}}$
Revised 14 January 2026 Nomenclature ${\displaystyle S_{n}=}$ sun gear: number of teeth ${\displaystyle R_{n}=}$ ring gear: number of teeth ${\displaystyle \color {gray}{C_{n}=}}$carrier or planetary gear carrier (not needed) ${\displaystyle s_{n}=}$ sun gear: shaft speed ${\displaystyle r_{n}=}$ ring gear: shaft speed ${\displaystyle c_{n}=}$ carrier or planetary gear carrier: shaft speed With ${\displaystyle n=}$ gear is ${\displaystyle i_{n}=}$ gear ratio or transmission ratio ${\displaystyle \omega _{1;n}=\omega _{t}=}$ shaft speed shaft 1: input (turbine) shaft ${\displaystyle \omega _{2;n}=}$ shaft speed shaft 2: output shaft ${\displaystyle T_{1;n}=T_{t}=}$ torque shaft 1: input (turbine) shaft ${\displaystyle T_{2;n}=}$ torque shaft 2: output shaft ${\displaystyle \mu _{n}=}$ torque ratio or torque conversion ratio ${\displaystyle \eta _{n}=}$ efficiency ${\displaystyle i_{0}=}$ stationary gear ratio ${\displaystyle \eta _{0}=}$ (assumed) stationary gear efficiency Gear Ratio (Transmission Ratio) ${\displaystyle i_{n}}$ — Speed Conversion — The gear ratio ${\displaystyle i_{n}}$ is the ratio of input shaft speed ${\displaystyle \omega _{1;n}}$ to output shaft speed ${\displaystyle \omega _{2;n}}$ and therefore corresponds to the reciprocal of the shaft speeds ${\displaystyle i_{n}={\frac {1}{\frac {\omega _{2;n}}{\omega _{1;n}}}}={\frac {\omega _{1;n}}{\omega _{2;n}}}={\frac {\omega _{t}}{\omega _{2;n}}}}$ Torque Ratio (Torque Conversion Ratio) ${\displaystyle \mu _{n}}$ — Torque Conversion — The torque ratio ${\displaystyle \mu _{n}}$ is the ratio of output torque ${\displaystyle T_{2;n}}$ to input torque ${\displaystyle T_{1;n}}$ minus efficiency losses and therefore corresponds (apart from the efficiency losses) to the reciprocal of the shaft speeds too ${\displaystyle \mu _{n}=i_{n}\eta _{n;\eta _{0}}={\frac {\omega _{1;n}\eta _{n;\eta _{0}}}{\omega _{2;n}}}={\frac {T_{2;n}\eta _{n;\eta _{0}}}{T_{1;n}}}}$ whereby ${\displaystyle \eta _{n;\eta _{0}}}$ may vary from gear to gear according to the formulas listed in this table and ${\displaystyle 0\leq \eta _{n;\eta _{0}}\leq 1}$ Efficiency The efficiency${\displaystyle \eta _{n}}$ is calculated from the torque ratio in relation to the gear ratio (transmission ratio) ${\displaystyle \eta _{n}={\frac {\mu _{n}}{i_{n}}}}$ Power loss for single meshing gears is in the range of 1 % to 1.5 % helical gear pairs, which are used to reduce noise in passenger cars, are in the upper part of the loss range spur gear pairs, which are limited to commercial vehicles due to their poorer noise comfort, are in the lower part of the loss range Corridor for torque ratio and efficiency in planetary gearsets, the stationary gear ratio ${\displaystyle i_{0}}$ is formed via the planetary gears and thus by two meshes for reasons of simplification, the efficiency for both meshes together is commonly specified there the efficiencies ${\displaystyle \eta _{0}}$ specified here are based on assumed efficiencies for the stationary ratio ${\displaystyle i_{0}}$ of ${\displaystyle \eta _{0}=0.9800}$ (upper value) and ${\displaystyle \eta _{0}=0.9700}$ (lower value) for both interventions together The corresponding efficiency for single-meshing gear pairs is ${\displaystyle {\eta _{0}}^{\tfrac {1}{2}}}$ at ${\displaystyle 0.9800^{\tfrac {1}{2}}=0.98995}$ (upper value) and ${\displaystyle 0.9700^{\tfrac {1}{2}}=0.98489}$ (lower value) Layout Input and output are on opposite sides Planetary gearset 1 is on the input (turbine) side Input (turbine) shafts are S1, C4, and, if actuated, C1 Output shaft is C3 Total Ratio Span (Total Gear Ratio/Total Transmission Ratio) Nominal ${\displaystyle {\frac {\omega _{2;n}}{\omega _{2;1}}}={\frac {\frac {1}{\omega _{2;1}}}{\frac {1}{\omega _{2;n}}}}={\frac {\frac {\omega _{t}}{\omega _{2;1}}}{\frac {\omega _{t}}{\omega _{2;n}}}}={\frac {i_{1}}{i_{n}}}}$ A wider span enables the downspeeding when driving outside the city limits increase the climbing ability when driving over mountain passes or off-road or when towing a trailer Total Ratio Span (Total Gear Ratio/Total Transmission Ratio) Effective ${\displaystyle {\frac {min(i_{1};|i_{R}|)}{i_{n}}}}$ The span is only effective to the extent that the reverse gear ratio matches that of 1st gear see also Standard R:1 Ratio Span's Center ${\displaystyle (i_{1}i_{n})^{\frac {1}{2}}}$ The center indicates the speed level of the transmission Together with the final drive ratio it gives the shaft speed level of the vehicle Except in 4th gear when used in the Simpson configuration Average Gear Step ${\displaystyle \left({\frac {i_{1}}{i_{n}}}\right)^{\frac {1}{n-1}}}$ With decreasing step width the gears connect better to each other shifting comfort increases Sun 1: sun gear of gearset 1 Ring 1: ring gear of gearset 1 Sun 2: sun gear of gearset 2 Ring 2: ring gear of gearset 2 Sun 3: sun gear of gearset 3 Ring 3: ring gear of gearset 3 Sun 4: sun gear of gearset 4 Ring 4: ring gear of gearset 4 Standard 50:50 — 50 % Is Above And 50 % Is Below The Average Gear Step — With steadily decreasing gear steps (yellow highlighted line Step) and a particularly large step from 1st to 2nd gear the lower half of the gear steps (between the small gears; rounded down, here the first 4) is always larger and the upper half of the gear steps (between the large gears; rounded up, here the last 4) is always smaller than the average gear step (cell marked yellow two rows above on the far right) lower half: smaller gear steps are a waste of possible ratios (red bold) upper half: larger gear steps are unsatisfactory (red bold) Standard R:1 — Reverse And 1st Gear Have The Same Ratio — The ideal reverse gear has the same transmission ratio as 1st gear no impairment when maneuvering especially when towing a trailer a torque converter can only partially compensate for this deficiency Plus 11.11 % minus 10 % compared to 1st gear is good Plus 25 % minus 20 % is acceptable (red) Above this is unsatisfactory (bold) see also Total Ratio Span (Total Gear Ratio/Total Transmission Ratio) Effective Standard 1:2 — Gear Step 1st To 2nd Gear As Small As Possible — With continuously decreasing gear steps (yellow highlighted line Step) the largest gear step is the one from 1st to 2nd gear, which for a good speed connection and a smooth gear shift must be as small as possible A gear ratio of up to 1.6667 : 1 (5 : 3) is good Up to 1.7500 : 1 (7 : 4) is acceptable (red) Above is unsatisfactory (bold) From large to small gears (from right to left) Standard STEP — From Large To Small Gears: Steady And Progressive Increase In Gear Steps — Gear steps should increase: Δ Step (first green highlighted line Δ Step) is always greater than 1 As progressive as possible: Δ Step is always greater than the previous step Not progressively increasing is acceptable (red) Not increasing is unsatisfactory (bold) Standard SPEED — From Small To Large Gears: Steady Increase In Shaft Speed Difference — Shaft speed differences should increase: Δ Shaft Speed (second line marked in greenΔ (Shaft) Speed) is always greater than the previous one 1 difference smaller than the previous one is acceptable (red) 2 consecutive ones are a waste of possible ratios (bold) First version with a gear ratio span wider than 9.1:1. [12] Was replaced by a slightly more narrowly stepped 2nd version with the introduction of the Mercedes-Benz E-Class (W213) series in 2016 without announcement to reduce the step between gear 4 and 5 below that of the 7G-Tronic (1.3684:1 [26:19]) [16] AMG SpeedShift MCT 9G is rated at 900  N⋅m (664  lb⋅ft) [11] under license from Daimler [C] Permanently coupled elements R1 and C2 R2, S3, and S4 Blocks C1 Blocks S2 Not involved. Only serves to maintain the shift logic: only one shift element is changed for step up or down Blocks R3 Couples S1 with C1 Couples C1 with R2 Couples C3 with R4 Ordinary Noted For direct determination of the gear ratio Elementary Noted Alternative representation for determining the transmission ratio Contains only operands With simple fractions of both central gears of a planetary gearset Or with the value 1 As a basis For reliable And traceable Determination of the torque ratio and efficiency

Maintenance

Compared to the predecessor gearboxes NAG 1 (5G-Tronic) and NAG 2 (7G-Tronic), the NAG 3 gearbox is much more highly integrated, meaning that repairs are only possible by replacing entire assemblies when servicing is required. ^[1] This applies, for example, to the oil filters permanently integrated in the plastic oil pan. ^[12] Another example is the fully integrated mechatronic module with sensors, control unit and electrohydraulic shift plate. This module must be replaced as a unit, even if, for example, only one sensor is defective. ^[12]

Nomogram

Planetary gearSet 1 – Planetary gearSet 2 – Planetary gearSet 3 – Planetary gearSet 4

▶️ Interactive Nomogram

This nomogram 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 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 from Robert Willis' famous and tedious formula, ^[17] because all calculations are exclusively determined by lengths ratios, respectively teeth numbers on the abscissa 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)
B: Brake (blocks R₃)
C: Brake (blocks C₁)
D: Clutch (couples C₃ with R₄)
E: Clutch (couples C₁ with R₂)
F: Clutch (couples S₁ with C₁)

Applications

Mercedes models

Mercedes C-Class

• 2018–2021 Mercedes-Benz W205 (all models)
• 2022–present Mercedes-Benz W206

Mercedes E-Class

• 2014–2016 Mercedes-Benz W212 (E 350 BlueTec only) available as an option to others.
• 2016–2023 Mercedes-Benz W213
• 2023–present Mercedes-Benz W214

Mercedes S-Class

• 2017–2021 Mercedes-Benz W222 (all except V12 models), (only Facelift models)
• 2021–present Mercedes-Benz W223

Mercedes V-Class

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

Mercedes GLC-Class

• 2015–2022 GLC (X253)
• 2022–present GLC (X254)

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 Ltd model JR913E

Nissan

• 2020–2024 Nissan Titan
• 2020–present Nissan Frontier
• 2023–present Nissan Z (RZ34)
• 2024–present Nissan Patrol (Middle East)
• 2025–present Nissan Armada

Infiniti

• 2025– Infiniti QX80

Aston Martin

• 2021–present Aston Martin DBX

See also

• List of Daimler AG transmissions
• List of Jatco transmissions

Notes

1. see Table 1 · p. 72 ^[6]
2. see cutaway model Figure 4 - p. 72 ^[6]
3. pp. 71 – 74 ^[6]

References

1. "New nine-speed automatic transmission debuts in the Mercedes-Benz E 350 BlueTEC: Premiere of the new 9G-TRONIC – Daimler Global Media Site". media.mercedes-benz.com. 2013-07-24. Retrieved 2024-10-29.
2. Daimler AG · Global Training (2013-09-06). "9-Speed Automatic Transmission (725.0) · Hand-outs for participants" . Retrieved 2014-04-07.
3. "9G-Tronic · Vertiefende Informationen" (in German). Archived from the original on 2015-11-20. Retrieved 2015-11-20.
4. "50 years of automatic transmissions from Mercedes-Benz". media.mercedes-benz.com. 2011-04-12. Retrieved 2024-10-29.
5. Rand Ash. "Mercedes gearbox codes: Convert Mercedes' 6 digit gearbox code to a gearbox model variant" . Retrieved 2026-01-14.
6. "Jatco Technical Review No. 20 · 2021" . Retrieved 2022-11-11.
7. "Daimler launches production of nine-speed automatic transmissions in Romania". 2016-04-04. Retrieved 2024-10-29.
8. "Daimler-Renault-Nissan – The alliance in action".
9. "Fact Sheet:Press Releases and Project Overview Daimler & Renault-Nissan Alliance" (PDF).
10. Christoph Dörr · Henrik Kalczynski · Anton Rink · Marcus Sommer: Nine-Speed Automatic Transmission 9G-Tronic By Mercedes-Benz (english version), in: ATZ 116 (2014) · No. 1 · pp. 20–25 · Springer Vieweg · Wiesbaden
11. Harald Naunheimer · Bernd Bertsche · Joachim Ryborz · Wolfgang Novak · Peter Fietkau: Vehicle Transmissions · pp. 571–572 · German : Harald Naunheimer · Bernd Bertsche · Joachim Ryborz · Wolfgang Novak · Peter Fietkau: Fahrzeuggetriebe · Berlin und Heidelberg 2019 · S. 571–572
12. "Automatic Transmission 9G-Tronic · 725.0 · System Description" (PDF). documents.epfl.ch. September 2013. Retrieved 2020-01-16. (PDF)
13. "Thomas Harloff: Neun-Gänge-Menü". 2014-05-27.
14. "Developed for in-house drive systems: The best out of 85 billion possibilities". 2014-03-06. Retrieved 2024-10-29.
15. "Archived copy of Mercedes-Benz Automatic Transmission 722.9 Technical Training Materials". Archived from the original on 2019-06-28. Retrieved 2019-06-28.
16. "The new Mercedes-Benz SL: The legend – now even more dynamic – Daimler Global Media Site". Media.daimler.com. Retrieved 2020-01-16. · German: Der neue Mercedes-Benz SL: Die Legende – jetzt noch dynamischer – Daimler Global Media Site
17. Robert Willis (1841). "Principles of mechanism" (PDF). Retrieved 2024-11-04.

External links

• Nine-Speed Automatic Transmission 9G-Tronic by Mercedes-Benz
• Nomographs and Feasibility Graphs for Enumeration of Ravigneaux-Type Automatic Transmissions