5G-Tronic
Overview
ManufacturerMercedes-Benz Group AG
Chrysler Group LLC
FCA-US
Also calledMercedes 722.6, Chrysler NAG1, Chrysler A580
Production1996-2020
Body and chassis
Class5-speed longitudinal automatic transmission
Chronology
PredecessorMercedes-Benz 4G-Tronic transmission
SuccessorMercedes-Benz 7G-Tronic transmission

5G-Tronic is Mercedes-Benz's trademark name for its five-speed automatic transmission, starting off with the W5A 580 and W5A 330 (Wandler-5-Gang-Automatik bis 580 oder 330 Nm Eingangsdrehmoment; converter-5-gear-automatic with 428 or 243 ft·lb maximum input torque; type 722.6) as core models.

Abstract

The 5G-Tronic (model W5A 330 and W5A 580 · type 722.6) is an electronically shifted 5-speed overdrive automatic transmission with torque converter lock-up (typically in gears 3, 4 and 5) and 2-speed for reverse. In all applications this transmission is identified as the New Automatic Gearbox Generation One, or NAG1.

It replaced the older 4-speed 4G-Tronic transmission-family and its 5-speed derivative, and was replaced by the significantly more complex and cost-intensive 7-speed[lower-alpha 1] Mercedes-Benz 7G-Tronic (model W7A 700 · type 722.9) transmission with 11 main components,[lower-alpha 2] introduced in 2003. Due to its high torque capacity (up to 1000 Nm) and lower cost, it was still retained for turbocharged V12 engines, four-cylinder applications and commercial vehicles for almost a decade. It is still being built for niche applications (e.g. Sprinter with petrol/CNG M111 engine, Jeep Wrangler, etc.).

Specifications

Basic concept

Technical and economic progress is reflected in 5 forward gears[lower-alpha 3] out of 9 main components,[lower-alpha 4] compared to 5 forward gears[lower-alpha 5] out of 11 main components[lower-alpha 6] in the direct predecessor. It is fully electronically controlled and equipped with a torque converter lock-up.

Gear ratios

Gear Teeth and Ratios Planetary Gearset: Teeth Count Total Avg.
Model
Type		 Version
First Delivery		 Sun 1
Ring 1		 Sun 2
Ring 2		 Sun 3
Ring 3		 Brakes
Clutches		 Ratio
Span		 Gear
Step
Gear R 1 R 2 1 2 3 4 5
W5A 330
722.6		 330 N⋅m (243 lb⋅ft)
1996[1][2]		 50
79		 34
70		 54
87		 3
3		 4.7345 1.4751
Ratio –3.1002 –1.8986 3.9319 2.4079 1.4857 1.0000 0.8305
W5A 580
722.6		 580 N⋅m (428 lb⋅ft)
1996[1][2]		 50
78		 30
74		 50
90		 3
3		 4.3152 1.4413
Ratio –3.1605 –1.9259 3.5876 2.1862 1.4054 1.0000 0.8314
W5A 900
722.6		 900 N⋅m (664 lb⋅ft)
1996		 50
78		 30
74		 50
90		 3
3		 4.3152 1.4413
Ratio –3.1605 –1.9259 3.5876 2.1862 1.4054 1.0000 0.8314
W5A 330
722.6		 330 N⋅m (243 lb⋅ft)
Chrysler · 2004		 58
92		 34
70		 65
103		 3
3		 4.7425 1.4757
Ratio –3.1473 –1.9303 3.9510 2.4233 1.4857 1.0000 0.8331
W5A 580
722.6		 580 N⋅m (428 lb⋅ft)
Chrysler · 2004		 58
90		 30
74		 60
108		 3
3		 4.3266 1.4422
Ratio –3.1671 –1.9259 3.5951 2.1862 1.4054 1.0000 0.8309
  1. ↑ plus 2 reverse gears
  2. ↑ 4 planetary gearsets (Ravigneaux planetary gearset considered as 2), 4 brakes, 3 clutches
  3. ↑ plus 2 reverse gears
  4. ↑ 3 simple planetary gearsets, 3 brakes, 3 clutches
  5. ↑ plus 1 reverse gear
  6. ↑ 4 planetary gearsets (Ravigneaux planetary gearset considered as 2), 4 brakes, 3 clutches

Special operating modes

Winter/Summer (Standard) Mode

Activated by a toggle switch, Winter mode sets the gearbox to start off in 2nd gear, both in Drive and Reverse. This is designed to reduce wheelspin on icy surfaces. Also in "W" mode the transmission will shift at lower speeds. "S" mode is not sport but Sommer (German for summer) or Standard.

With Jaguar XJR applications the switch is labelled "Sport". In regular driving mode the gearbox starts off in 2nd gear, both in Drive and Reverse, and will only engage 1st gear when triggered via the kickdown switch (Drive only). While "Sport" mode is enabled the gearbox will always start off in 1st gear.

Speedshift (2001-)

Speedshift is a performance feature set for the Mercedes-Benz transmissions which includes manual mode and active downshifting. When cornering at high speed, the transmission maintains the same gear above a certain lateral acceleration level. It can also automatically downshift before overtaking.

It was first used in 2001 Mercedes-Benz C 32 AMG[3] and 2001 Mercedes-Benz SLK 32 AMG.[4]

AMG Speedshift (2002-)

A version with mechanical lock-up of the torque converter from first gear and steering-wheel-mounted shifter. AMG Speedshift is also used in 7G-Tronic transmission.[5]

It was first used in 2002 Mercedes-Benz E 55 AMG, S 55 AMG, C55, CL 55 AMG.[6]

AMG Speedshift R

A version used in Mercedes-Benz SLR McLaren. It includes three manual modes.

Applications

Mercedes models

Mercedes S-Class

Mercedes CL

Mercedes CLS

Mercedes E-Class

Mercedes C-Class

Mercedes CLK

Mercedes ML

Mercedes G-Class

Mercedes SLK

Mercedes SL

Mercedes SLR

Maybach

Non Mercedes-Benz models

Jeep

Dodge

Chrysler

Lancia

Jaguar

SsangYong

Porsche

Freightliner

See also

References

  1. 1 2 https://www.scribd.com/embeds/92643386/content?start_page=1&view_mode=list&access_key=key-7h437wiv215r2tv8d93>
  2. 1 2 http://www.w124performance.com/docs/mb/transmission/722.6/trans_722.6_ATSG_2004.pdf>
  3. ↑ C 32 AMG: High-performance saloon with a high-torque, six-cylinder supercharged engine
  4. ↑ SLK 32 AMG: 354 hp V6 - the new leader among the compact roadsters
  5. ↑ The new Mercedes-Benz SLK-Class: Celebrating its world premiere at the Geneva Motor Show
  6. ↑ Mercedes-AMG GmbH launches V8 Kompressor initiative: up to 368 kW/500 hp for the E-Class, S-Class and CL-Class
  7. ↑ de:Jeep Grand Cherokee
  8. ↑ de:Jeep Wrangler
  9. ↑ Chrysler Crossfire
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