| 9G-Tronic | |
|---|---|
 Cutaway model of the transmission with components for hybrid drive | |
| Overview | |
| Manufacturer | Daimler AG Jatco Ltd |
| 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, starting off with the W9A 700 (Wandler-9-Gang-Automatik bis 700 N⋅m Eingangsdrehmoment; converter-9-gear-automatic with 700 N⋅m (516 lb⋅ft) maximum input torque; type 725.0[1]) as core model. The transmission debuted on the E 350 BlueTEC in 2013,[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).[2]
After the 5G- and 7G-Tronic, this is the 3rd generation of modern automatic transmissions. Therefore this transmission is identified internally as NAG3 (New Automatic Gearbox 3rd generation).[3] In order to increase the number of ratios, the previous restriction to the design as a pure in-line transmission has been abandoned and combined with that of the parallel epicyclic gearing.
Gear Model
|
R | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | Total Span |
Span Center |
Avg. Step |
Compo- nents |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| W9A All · 2013 | −4.932 | 5.503 | 3.333 | 2.315 | 1.661 | 1.211 | 1.000 | 0.865 | 0.717 | 0.601 | 9.150 | 1.819 | 1.319 | 4 Gearsets 3 Brakes 3 Clutches |
| W9A All · 2016 | −4.798 | 5.354 | 3.243 | 2.252 | 1.636 | 1.211 | 1.000 | 0.865 | 0.717 | 0.601 | 8.902 | 1.795 | 1.314 | |
| 9AT All · 2019 | −4.799 | 5.425 | 3.263 | 2.250 | 1.649 | 1.221 | 1.000 | 0.862 | 0.713 | 0.597 | 9.091 | 1.799 | 1.318 | |
- ^ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
- ^ a b "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.
- ^ "9G-Tronic · Vertiefende Informationen" (in German). Archived from the original on 2015-11-20. Retrieved 2015-11-20.
- ^ "50 years of automatic transmissions from Mercedes-Benz". media.mercedes-benz.com. 2011-04-12. Retrieved 2024-10-29.