GM 6L transmission
6L 45 · 6L 50 · 6L 80 · 6L 90 | |
---|---|
![]() A Hydra-Matic 6L80 transmission at the Ypsilanti Automotive Heritage Museum | |
Overview | |
Manufacturer | General Motors |
Production | 2005–present |
Body and chassis | |
Class | 6-Speed Longitudinal Automatic Transmission |
Related | Aisin AWTF-80 SC Ford 6R ZF 6HP |
Chronology | |
Predecessor | 4L60-E · 4L65-E 5L40-E · 5L50 |
Successor | 8L 45 · 8L 90 |
The 6L 50 (and similar 6L 45) is a 6-speed longitudinally-mounted automatic transmission produced by General Motors. It is very similar in design to the larger GM 6L 80 and 6L 90, and is produced at GM Powertrain plants in Toledo, Ohio; Silao, Guanajuato, Mexico; and by the independent Punch Powerglide company in Strasbourg, France.
This transmission features clutch to clutch shifting, eliminating the bands used on older transmission designs. The 6L 50 debuted for the 2007 model year on the V8-powered versions of the Cadillac STS sedan and Cadillac SRX crossover, and replaces the 5L40-E and 5L50 in GM's lineup. The 6L 45 version is used in certain BMW vehicles and the Cadillac ATS, as part of either rear-wheel drive and all-wheel drive powertrains.
The 6L 80 (and similar 6L 90) is a six-speed automatic transmission built by General Motors at its Willow Run Transmission plant in Ypsilanti, MI. It was introduced in late 2005, and is very similar in design to the smaller 6L 45 and 6L 50, produced at GM Powertrain in Strasbourg, France.
It features clutch to clutch shifting, eliminating the one-way clutches used on older transmission designs. In February 2006 GM announced that it would invest $500 million to expand the Toledo Transmission plant in Toledo, Ohio to produce the 6L 80 in 2008. Torque rating 6L 80 590 lb⋅ft (800 N⋅m), 6L 90 885 lb⋅ft (1,200 N⋅m) and is adaptable to rear-wheel drive and all-wheel drive applications.
Specifications
[edit]Basic concept
[edit]A conventional planetary gearset and a compound Ravigneaux gearset is combined in a Lepelletier gear mechanism,[1] to reduce both the size and weight. It was first realized with the 6HP from ZF Friedrichshafen. Like all transmissions realized with Lepelletier transmissions, the 6L also dispenses with the use of the direct gear ratio, making it one of the very few automatic transmission concepts without such a ratio.
It also has the capability to achieve torque converter lock-up on all six forward gears, and disengage it completely when at a standstill, significantly closing the fuel efficiency gap between automatic and manual transmissions.
Technical data
[edit]Gear Model | R | 1 | 2 | 3 | 4 | 5 | 6 | Total Span | Avg. Step | Compo- nents |
---|---|---|---|---|---|---|---|---|---|---|
6L 45 MYA · 6L 50 MYB | −3.200 | 4.065 | 2.371 | 1.551 | 1.157 | 0.853 | 0.674 | 6.035 | 1.433 | 3 Gearsets 2 Brakes 3 Clutches |
6L 80 MYC · 6L 90 MYD | −3.064 | 4.027 | 2.364 | 1.532 | 1.152 | 0.852 | 0.667 | 6.040 | 1.433 | |
ZF 6HP All · 2000[b] | −3.403 | 4.171 | 2.340 | 1.521 | 1.143 | 0.867 | 0.691 | 6.035 | 1.433 |
6L 45 MYA · 6L 50 MYB | 6L 80 MYC · 6L 90 MYD | |
---|---|---|
Input Capacity | ||
Maximum engine power | 315 bhp (235 kW) | 555 bhp (414 kW) |
Maximum gearbox torque | 450 N⋅m (332 lb⋅ft) 480 N⋅m (354 lb⋅ft) | 800 N⋅m (590 lb⋅ft) 1,200 N⋅m (885 lb⋅ft) |
Maximum shift speed | 7,000/min | 6,200/min |
Vehicle | ||
Maximum Validated Weight Gross Vehicle Weight · GVW | 5,000 lb (2,270 kg) 6,610 lb (3,000 kg) | 15,000 lb (6,800 kg) |
Maximum Validated Weight Gross Curb Vehicle Weight · GCVW | 12,500 lb (5,670 kg) | 21,000 lb (9,530 kg) |
Gearbox | ||
7-position quadrant | P · R · N · D · X · X · X[a] | |
Case material | Die cast aluminum | |
Shift pattern (2) | Three-way on/off solenoids | |
Shift quality | Five variable bleed solenoid | |
Torque converter clutch | Variable Bleed Solenoid ECCC | |
Converter size | 240 mm (9.45 in) | 258 mm (10.16 in) |
Fluid type | DEXRON VI | |
Fluid capacity | 9.1 kg with 258 & 300 mm | |
Available Control Features | ||
Shift Patterns | Multiple (Selectable) | |
Driver Shift Control | Tap Up · Tap Down | |
Shifting | Enhanced Performance Algorithm Shifting (PAS) | |
Additional Modes | Tow & Haul Mode (Selectable) | |
Engine Torque Management | On All Shifts | |
Shift Control | Altitude & Temperature Compensation Adaptive Shift Time Neutral Idle Reverse Lockout Automatic Grade Braking | |
Additional Features | ||
Control | OBDII · EOBD Integral Electro/Hydraulic Controls Module (Tehcm) Control Interface Protocol – GMLAN The transmission control module (TCM) is built into the solenoid pack/housing | |
Assembly sites | GMPT[b] Strasbourg · France GMPT[b] Toledo · Ohio · USA GMPT[b] Silao · Mexico | |
With Assessment[a][b] | Planetary Gearset: Teeth[c] Lepelletier Gear Mechanism | Count | Total | Avg. | |||
---|---|---|---|---|---|---|---|
Simple | Ravigneaux | ||||||
Model | Version First Delivery | S1[d] R1[e] | S2[f] R2[g] | S3[h] R3[i] | Brakes Clutches | Ratio Span | Gear Step[j] |
Gear Ratio | R | 1 | 2 | 3 | 4 | 5 | 6 |
Step | [k] | [l] | |||||
Step 2[m] | |||||||
Shaft Speed | |||||||
Δ Shaft Speed | |||||||
6L 45 MYA 6L 50 MYB | 500 N⋅m (369 lb⋅ft) 2005 | 49 89 | 37 47 | 47 97 | 2 3 | 6.0346 | 1.4326[j] |
Gear Ratio | −3.2001[k] | 4.0650 | 2.3712[l][n] | 1.5506 | 1.1567[n][o] | 0.8532 | 0.6736 |
Step | 0.7872[k] | 1.0000 | 1.7143[l] | 1.5293 | 1.3406 | 1.3557 | 1.2662 |
Step 2[m] | 1.1210[n] | 1.1408 | 0.9889[n] | 1.0703 | |||
Speed | –1.2703 | 1.0000 | 1.7143 | 2.6216 | 3.5144 | 4.7643 | 6.0346 |
Δ Speed | 1.2703 | 1.0000 | 0.7143 | 0.9073 | 0.8928[o] | 1.2499 | 1.2703 |
6L 80 MYC 6L 90 MYD | 800 N⋅m (590 lb⋅ft) 2005 | 50 94 | 35 46 | 46 92 | 2 3 | 6.0401 | 1.4329[j] |
Gear Ratio | −3.0638[k] | 4.0267 | 2.3635[l][n] | 1.5319 | 1.1522[n][o] | 0.8521 | 0.6667 |
Step | 0.7609[k] | 1.0000 | 1.7037[l] | 1.5429 | 1.3296 | 1.3522 | 1.2781 |
Step 2[m] | 1.1043[n] | 1.1604 | 0.9832[n] | 1.0580 | |||
Speed | –1.3143 | 1.0000 | 1.7037 | 2.6286 | 3.4948 | 4.7258 | 6.0401 |
Δ Speed | 1.3143 | 1.0000 | 0.7037 | 0.9249 | 0.8662[o] | 1.2310 | 1.3143 |
ZF 6HP | All[b] · 2000[p] | 37 71 | 31 38 | 38 85 | 2 3 | 6.0354 | 1.4327[j] |
Gear Ratio | −3.4025[k] | 4.1708 | 2.3397[l] | 1.5211 | 1.1428[n][o] | 0.8672 | 0.6911 |
Step | 0.8158[k] | 1.0000 | 1.7826[l] | 1.5382 | 1.3311 | 1.3178 | 1.2549 |
Step 2[m] | 1.1589 | 1.1559 | 1.0101[n] | 1.0502 | |||
Speed | –1.2258 | 1.0000 | 1.7826 | 2.7419 | 3.6497 | 4.8096 | 6.0354 |
Δ Speed | 1.2258 | 1.0000 | 0.7826 | 0.9593 | 0.9078[o] | 1.1599 | 1.2258 |
Ratio R & Even | |||||||
Ratio Odd | |||||||
Algebra And Actuated Shift Elements | |||||||
Brake A[q] | ❶ | ❶ | ❶ | ❶ | |||
Brake B[r] | ❶ | ❶ | ❶ | ||||
Clutch C[s] | ❶ | ❶ | |||||
Clutch D[t] | ❶ | ❶ | |||||
Clutch E[u] | ❶ | ❶ | ❶ | ||||
| |||||||
Applications
[edit]6L 45 MYA
[edit]- 2007–2010: BMW X3 - 3.0si / 2.5si / 3.0i
- 2007–2013: BMW 3 series - 330(x)i / 328(x)i / 325(x)i / 323i / 320i / 318i / 316i
- 2007–2019: BMW 1 series - 130i / 128i / 125i / 120i / 118i / 116i
- 2009–2015: BMW X1 (E84) - 2.8i xDrive / 2.5i xDrive / 1.8i sDrive
- 2013–2015: Cadillac ATS[2]
- 2010–2013: Cadillac SLS
- 2012–2017: Chevrolet Caprice PPV V6
- 2011–2013: Holden VE Commodore, Calais, SV6
- 2013–2017: Holden VF Commodore, Calais, SV6
6L 50 MYB
[edit]- 2007–2011: Cadillac SLS
- 2007–2011: Cadillac STS
- 2007–2009: Cadillac SRX
- 2008–2015: Cadillac CTS
- 2010–2015: Camaro LS/LT (V6 Models)
- 2009–2011: Holden VE Commodore / Holden VE Berlina / Holden VE Calais / Chevrolet Lumina / Chevrolet Omega
- 2009–2011: Holden WM Statesman/Caprice / Daewoo Veritas
- 2015–2022: Chevrolet Colorado[3]
- 2017–2020: Tata Hexa
- 2019–present: UAZ Patriot
- 2022–present: Bremach[4]
6L 80 MYC
[edit]- 2006–2009 Cadillac XLR-V[5]
- 2006–2013 Chevrolet Corvette
- 2006 Holden VE Commodore/2008-2009 Pontiac G8
- 2006–2013 Holden/Chevrolet WM Statesman/Caprice
- 2014–2017 Holden/Chevrolet WN Statesman/Caprice
- 2007–2013 GMC Sierra Denali
- 2009–2013 Chevrolet Silverado 1500 5.3 (ext. & crew cab), 6.2
- 2009–2013 GMC Sierra 1500 5.3 (ext. & crew cab), 6.2
- 2010–2013 Chevrolet Silverado 1500 5.3 (reg. cab)
- 2010–2013 GMC Sierra 1500 5.3 (reg. cab)
- 2006–2009 Cadillac STS-V
- 2007–2015 Cadillac Escalade
- 2007–2015 Cadillac Escalade ESV
- 2007–2013 Cadillac Escalade EXT
- 2007–2015 GMC Yukon Denali
- 2009–2020 Chevrolet Tahoe
- 2009–2020 GMC Yukon
- 2009–2020 Chevrolet Suburban 1500
- 2009–2020 GMC Yukon XL
- 2008–2009 Hummer H2
- 2014–2019 (K2XX) Chevrolet Silverado/GMC Sierra 1500
- 2010–2015 Chevrolet Camaro
- 2011–2017 Chevrolet Caprice PPV
- 2011(September)–2013 Holden VE Commodore Series 2(MY 2012)
- 2014–2017 Holden VF Commodore / Chevrolet SS
- 2009–2013 Chevrolet Avalanche
- 2019–2021 (T1XX) Chevrolet Silverado/GMC Sierra 1500
6L 90 MYD
[edit]- 2007–2014 Chevrolet Silverado 2500HD/3500 HD 6.0
- 2007–2014 GMC Sierra 2500HD/3500HD 6.0
- 2010–present Chevrolet Express 2500–3500
- 2010–present GMC Savana 2500–3500
- 2008–2019 Chevrolet Suburban 2500
- 2009–2013 Cadillac CTS-V
- 2012–2015 Chevrolet Camaro ZL1
- 2015–2019 Chevrolet Silverado 2500HD/3500 HD 6.0
- 2015–2019 GMC Sierra 2500HD/3500HD 6.0
- 2020–2023 Chevrolet Silverado 2500HD/3500 HD 6.6 L8T
- 2020–2023 GMC Sierra 2500HD/3500HD 6.6 L8T
See also
[edit]- List of GM transmissions
- "GM Launches More Fuel-Saving Six-Speed Automatic Transmissions". GM Media Online. Retrieved June 18, 2006. [dead link]
- Cadillac PDF info on 6L 80-E Transmission: http://www.cadillacfaq.com/stsfaq/tsb/data/tsb/05-07-30-023.pdf
- "GM Ypsilanti Begins 6-Speed Production". Automotive Design and Production. Archived from the original on March 3, 2006. Retrieved January 3, 2006.
References
[edit]- ^ Riley, Mike (2013-09-01). "Lepelletier Planetary System". Transmission Digest. Archived from the original on 2023-06-21. Retrieved 2023-03-03.
- ^ Csere, Csaba (March 2012). Dissected: 2013 Cadillac ATS. ISBN 9781858941905. OCLC 38224673. Archived from the original on 2012-10-30. Retrieved 2012-11-21.
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ignored (help) - ^ "2015 Chevrolet Colorado Specifications". GM. Retrieved 2014-10-14.
- ^ "Bremach Suv".
- ^ "GM Corporate Newsroom - United States - Home". media.gm.com. Retrieved 2016-10-26.