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Mercedes-Benz 5G-Tronic transmission

From Wikipedia, the free encyclopedia
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
RelatedZF 5HP transmission family
Chronology
Predecessor4G-Tronic
Successor7G-Tronic

5G-Tronic is Mercedes-Benz's trademark name for its 5-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 330 N⋅m (243 lb⋅ft) or 580 N⋅m (428 lb⋅ft) maximum input torque; type 722.6) as core models.

It replaced the older 4-speed 4G-Tronic transmission-family and its 5-speed derivative, and was replaced by the much more complex and costly 7-speed[a] Mercedes-Benz 7G-Tronic (model W7A 700 · type 722.9) transmission with 11 main components introduced in 2003. Due to its high torque capacity (up to 1,000 N⋅m (738 lb⋅ft)) and lower cost, it was retained for turbocharged V12 engines, 4-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.).

Gear Ratios[b]
Gear
Model
R 2 R 1 1 2 3 4 5 Total
Span
Span
Center
Avg.
Step
Compo-
nents
W5A 330 · 1996 −1.899 −3.100 3.932 2.408 1.486 1.000 0.830 4.735 1.807 1.475 3 Gearsets
3 Brakes
3 Clutches
W5A 580 · 1996 −1.926 −3.160 3.588 2.186 1.405 1.000 0.831 4.315 1.727 1.441
W5A 330 · 2004 −1.930 −3.147 3.951 2.423 1.486 1.000 0.833 4.742 1.814 1.476
W5A 580 · 2004 −1.926 −3.167 3.595 2.186 1.405 1.000 0.831 4.327 1.728 1.442
  1. ^ plus 2 reverse gears
  2. ^ Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage

Specifications

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Layout

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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. Progress is reflected in 5 forward gears[a] using 9 main components, compared to 5 forward gears[b] with 11 main components in the direct predecessor. It is fully electronically controlled and equipped with a torque converter lock-up.

Operating Modes

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Winter/Summer (Standard) Mode

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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–)

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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[1] and 2001 Mercedes-Benz SLK 32 AMG.[2]

AMG Speedshift (2002–)

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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.[3]

It was first used in 2002 Mercedes-Benz E 55 AMG, S 55 AMG, C55, CL 55 AMG.[4]

AMG Speedshift R

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

  1. ^ plus 2 reverse gears
  2. ^ plus 1 reverse gear
Gear Ratios
With Assessment Planetary Gearset: Teeth[a] Count Total[b]
Center[c]
Avg.[d]
Model
Type
Version
First Delivery
S1[e]
R1[f]
S2[g]
R2[h]
S3[i]
R3[j]
Brakes
Clutches
Ratio
Span
Gear
Step[k]
Gear
Ratio
R 2
R 1
1
2
3
4
5
Step[k] [l] [m]
Δ Step[n][o]
Shaft
Speed
Δ Shaft
Speed[p]
W5A 280
722.6[q]
280 N⋅m (207 lb⋅ft)
1996
50
79
34
70
54
87
3
3
4.7345
1.8070
1.4751[k]
Ratio −1.8986 −3.1002[l] 3.9319 2.4079[o] 1.4857[o] 1.0000[k] 0.8305[p]
W5A 300
722.6[r]
300 N⋅m (221 lb⋅ft)
1996
50
79
34
70
54
87
3
3
4.7345
1.8070
1.4751[k]
Ratio −1.8986 −3.1002[l] 3.9319 2.4079[o] 1.4857[o] 1.0000[k] 0.8305[p]
W5A 330
722.6[s]
330 N⋅m (243 lb⋅ft)
1996
50
79
34
70
54
87
3
3
4.7345
1.8070
1.4751[k]
Gear
Ratio
−1.8986
−3.1002[l]
3.9319
2.4079[o]
1.4857[o]
1.0000[k]
0.8305[p]
Step 1.6329 0.7885[l] 1.0000 1.6329 1.6207 1.4857[k] 1.2042
Δ Step[n] 1.0075[o] 1.0908[o] 1.2338
Speed –2.0709 -1.2683 1.0000 1.6329 2.6464 3.9319 4.7345
Δ Speed 0.8027 1.2683 1.0000 0.6329 1.0135 1.2854 0.8027[p]
W5A 400
722.6[t]
400 N⋅m (295 lb⋅ft)
1996
50
78
30
74
50
90
3
3
4.3152
1.7270
1.4413[k]
Ratio −1.9259 −3.1605[l] 3.5876 2.1862[o] 1.4054[o] 1.0000 0.8314[p]
W5A 580
722.6[u]
580 N⋅m (428 lb⋅ft)
1996[5][6]
50
78
30
74
50
90
3
3
4.3152
1.7270
1.4413[k]
Gear
Ratio
−1.9259
−3.1605[l]
3.5876
2.1862[o]
1.4054[o]
1.0000
0.8314[p]
Step 1.6410 0.8810[l] 1.0000 1.6410 1.5556 1.4054 1.2028
Δ Step[n] 1.0549[o] 1.1068[o] 1.1684
Speed –1.8628 -1.1351 1.0000 1.6410 2.5527 3.5876 4.3152
Δ Speed 0.7277 1.1351 1.0000 0.6410 0.9117 !1.0349 0.7277[p]
W5A 900
722.6[v]
900 N⋅m (664 lb⋅ft)
1996
50
78
30
74
50
90
3
3
4.3152
1.7270
1.4413[k]
Ratio −1.9259 −3.1605[l] 3.5876 2.1862[o] 1.4054[o] 1.0000 0.8314[p]
W5A 330
722.6[w]
330 N⋅m (243 lb⋅ft)
Chrysler · 2004
58
92
34
70
65
103
3
3
4.7425
1.8143
1.4757[k]
Gear
Ratio
−1.9303
−3.1473[l]
3.9510
2.4233[o]
1.4857[o]
1.0000[k]
0.8331[p]
Step 1.6304 0.7966[l] 1.0000 1.6304 1.6311 1.4857[k] 1.2003
Δ Step[n] 0.9996[o] 1.0978[o] 1.2378
Speed –2.0709 -1.2683 1.0000 1.6329 2.6464 3.9319 4.7345
Δ Speed 0.8027 1.2683 1.0000 0.6329 1.0135 1.2854 0.8027[p]
W5A 580
722.6[x]
580 N⋅m (428 lb⋅ft)
Chrysler · 2004
58
90
30
74
60
108
3
3
4.3266
1.7284
1.4422[k]
Gear
Ratio
−1.9259
−3.1671[l]
3.5951
2.1862[o]
1.4054[o]
1.0000
0.8309[p]
Step 1.6444 0.8810[l] 1.0000 1.6444 1.5556 1.4054 1.2035
Δ Step[n] 1.0571[o] 1.1068[o] 1.1678
Speed –1.8667 -1.1351 1.0000 1.6444 2.5580 3.5951 4.3266
Δ Speed 0.7315 1.1351 1.0000 0.6444 0.9136 1.0370 0.7315[p]
Ratio
R & Even
Ratio
R & Odd
Algebra And Actuated Shift Elements[y]
Brake 1[z]
Brake 2[aa]
Brake BR[ab]
Clutch 1[ac]
Clutch 2[ad]
Clutch 3[ae]
  1. ^ Layout
    • Input and output are on opposite sides
    • Planetary gearset 1 is on the input (turbine) side
    • Input shafts are R1 and, if actuated, R2
    • Output shaft is C2 (planetary gear carrier of gearset 3)
  2. ^ Total Ratio Span (Total Ratio Spread · Total Gear Ratio)
    • 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
  3. ^ Ratio Span's Center
    • The center indicates the speed level of the transmission
    • Together with the final drive ratio
    • it gives the shaft speed level of the vehicle
  4. ^ Average Gear Step
    • With decreasing step width
      • the gears connect better to each other
      • shifting comfort increases
  5. ^ Sun 1: sun gear of gearset 1
  6. ^ Ring 1: ring gear of gearset 1
  7. ^ Sun 2: sun gear of gearset 2
  8. ^ Ring 2: ring gear of gearset 2
  9. ^ Sun 3: sun gear of gearset 3
  10. ^ Ring 3: ring gear of gearset 3
  11. ^ a b c d e f g h i j k l m n o p 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 2) is always larger
      • and the upper half of the gear steps (between the large gears; rounded up, here the last 2) is always smaller
    • than the average gear step (cell highlighted 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)
  12. ^ a b c d e f g h i j k l m 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)
  13. ^ Standard 1:2
    — Gear Step 1st To 2nd Gear As Small As Possible —
    • With continuously decreasing gear steps (yellow marked 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)
  14. ^ a b c d e From large to small gears (from right to left)
  15. ^ a b c d e f g h i j k l m n o p q r s t u v w x y 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)
  16. ^ a b c d e f g h i j k l m 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 green Δ (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)
  17. ^ for Vans: Vito · Sprinter · Vario[5][6]
  18. ^ for SUV with 6 cylinder engines[5][6]
  19. ^ for passenger cars with 4, 5 and 6 cylinder engines[5][6]
  20. ^ for SUV with 8 cylinder engines[5][6]
  21. ^ for passenger cars with 8 and 12 cylinder engines and later for the 6 cylinder turbocharged diesel direct injection engines[5][6]
  22. ^ for cars with 8 and 12 cylinder turbocharged engines[5][6]
  23. ^ for cars from Chrysler with 6 cylinder engines[5][6]
  24. ^ for cars from Chrysler with 8 cylinder engines[5][6]
  25. ^ Permanently coupled elements
    • C1 (carrier 1) and R3
    • R2 and C3 (carrier 3)
  26. ^ Blocks S1
  27. ^ Blocks S2
  28. ^ Blocks R2 and C3 (carrier 3)
  29. ^ Couples S1 with C1 (carrier 1)
  30. ^ Couples R2 with the turbine
  31. ^ Couples S2 with S3

Applications

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Mercedes models

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Mercedes S-Class

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Mercedes CL

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Mercedes CLS

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Mercedes E-Class

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Mercedes C-Class

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Mercedes CLK

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Mercedes ML

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Mercedes G-Class

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Mercedes SLK

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Mercedes SL

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Mercedes SLR

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Maybach

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Non Mercedes-Benz models

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Jeep

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Dodge

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Chrysler

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Lancia

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Jaguar

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SsangYong

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Porsche

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Freightliner

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See also

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References

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