GM_6L_transmission

6L 45 · 6L 50 · 6L 80 · 6L 90
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

GM 6L transmission

Automatic transmission family produced by General Motors

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.

Quick Facts 6L 45 · 6L 50 · 6L 80 · 6L 90, Overview ...

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

Technical data

More information

, ...

Gear Teeth and Ratios^{[lower-alpha 1]}^{[lower-alpha 2]}^{[lower-alpha 3]}		Planetary Gearset: Teeth^{[lower-alpha 4]} Lepelletier Gear Mechanism			Count	Total	Avg.
		Simple	Ravigneaux		Count	Total	Avg.

Model	Version First Delivery	${S_{1}}$ ^{[lower-alpha 5]} ${R_{1}}$ ^{[lower-alpha 6]}	${S_{2}}$ ^{[lower-alpha 7]} ${R_{2}}$ ^{[lower-alpha 8]}	${S_{3}}$ ^{[lower-alpha 9]} ${R_{3}}$ ^{[lower-alpha 10]}	Brakes Clutches	Ratio Span	Gear Step
Gear $n$	R	1	2	3	4	5	6
Step $i_{n-1}/i_{n}$	–R : 1		1 : 2	2 : 3	3 : 4	4 : 5	5 : 6

6L 45 MYA 6L 50 MYB	450 N⋅m (332 lb⋅ft) 500 N⋅m (369 lb⋅ft) · 2006	49 89	37 47	47 97	2 3	6.0346	1.4326
Ratio $i_{n}$	−3.2001 $-{\tfrac {13,386}{4,183}}$	4.0650 ${\tfrac {629,142}{154,771}}$	2.3712 ${\tfrac {15,617}{6,586}}$	1.5506 ${\tfrac {138}{89}}$	1.1567 ${\tfrac {13,386}{11,573}}$	0.8532 ${\tfrac {13,386}{15,689}}$	0.6736 ${\tfrac {97}{144}}$
Step	0.7872		1.7143	1.5293	1.3406	1.3557	1.2662

6L 80 MYC 6L 90 MYD	800 N⋅m (590 lb⋅ft) · 2005 1,200 N⋅m (885 lb⋅ft)	50 94	35 46	46 92	2 3	6.0401	1.4329
Ratio $i_{n}$	−3.0638 $-{\tfrac {144}{47}}$	4.0267 ${\tfrac {6,624}{1,645}}$	2.3635 ${\tfrac {3,888}{1,645}}$	1.5319 ${\tfrac {72}{47}}$	1.1522 ${\tfrac {6,624}{5,749}}$	0.8521 ${\tfrac {144}{169}}$	0.6667 ${\tfrac {2}{3}}$
Step	0.7607		1.7037	1.5429	1.3296	1.3522	1.2781

ZF 6HP all^{[lower-alpha 11]}	2000	37 71	31 38	38 85	2 3	6.0354	1.4327
Ratio $i_{n}$	−3.4025 $-{\tfrac {4,590}{1,349}}$	4.1708 ${\tfrac {9,180}{2,201}}$	2.3397 ${\tfrac {211,140}{90,241}}$	1.5211 ${\tfrac {108}{71}}$	1.1428 ${\tfrac {9,180}{8,033}}$	0.8672 ${\tfrac {9,180}{10,586}}$	0.6911 ${\tfrac {85}{123}}$
Step	0.8158		1.7826	1.5382	1.3311	1.3178	1.2549

Ratio R & Even	$-{\tfrac {R_{3}(S_{1}+R_{1})}{R_{1}S_{3}}}$	${\tfrac {R_{3}(S_{1}+R_{1})(S_{2}+R_{2})}{R_{1}S_{2}(S_{3}+R_{3})}}$		${\tfrac {R_{2}R_{3}(S_{1}+R_{1})}{R_{2}R_{3}(S_{1}+R_{1})-S_{1}S_{2}S_{3}}}$		${\tfrac {R_{3}}{S_{3}+R_{3}}}$
Ratio Odd	${\tfrac {R_{2}R_{3}(S_{1}+R_{1})}{R_{1}S_{2}S_{3}}}$		${\tfrac {S_{1}+R_{1}}{R_{1}}}$		${\tfrac {R_{3}(S_{1}+R_{1})}{R_{3}(S_{1}+R_{1})+S_{1}S_{3}}}$

The 6L-transmission is based on the Lepelletier gear mechanism, first realized in the ZF 6HP gearbox
Other gearboxes using the Lepelletier gear mechanism see infobox
Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage
Layout
(1) Planetary gearset 1 is on the input (turbine) side
(2) Output shaft is ring 3 (ring gear of gearset 3: outer Ravigneaux gearset)
Sun 1: sun gear of gearset 1
Ring 1: ring gear of gearset 1
Sun 2: sun gear of gearset 2: inner Ravigneaux gearset
Ring 2: ring gear of gearset 2: inner Ravigneaux gearset
Sun 3: sun gear of gearset 3: outer Ravigneaux gearset
Ring 3: ring gear of gearset 3: outer Ravigneaux gearset
First gearbox on the market to use the Lepelletier gear mechanism
for comparison purposes only

Share this article:

This article uses material from the Wikipedia article GM_6L_transmission, and is written by contributors. Text is available under a CC BY-SA 4.0 International License; additional terms may apply. Images, videos and audio are available under their respective licenses.

[2] The 6L-transmission is based on the Lepelletier gear mechanism, first realized in the ZF 6HP gearbox

[3] Other gearboxes using the Lepelletier gear mechanism see infobox

[4] Differences in gear ratios have a measurable, direct impact on vehicle dynamics, performance, waste emissions as well as fuel mileage

[5] Layout
(1) Planetary gearset 1 is on the input (turbine) side
(2) Output shaft is ring 3 (ring gear of gearset 3: outer Ravigneaux gearset)

[6] Sun 1: sun gear of gearset 1

[7] Ring 1: ring gear of gearset 1

[8] Sun 2: sun gear of gearset 2: inner Ravigneaux gearset

[9] Ring 2: ring gear of gearset 2: inner Ravigneaux gearset

[10] Sun 3: sun gear of gearset 3: outer Ravigneaux gearset

[11] Ring 3: ring gear of gearset 3: outer Ravigneaux gearset

[12] First gearbox on the market to use the Lepelletier gear mechanism
for comparison purposes only

[13] X: available calibratable range position

[GMPT-14] General Motors Powertrain

[1] [1]
Riley, Mike (2013-09-01). "Lepelletier Planetary System". Transmission Digest. Archived from the original on 2023-06-21. Retrieved 2023-03-03.

[csere-15] [2]
Csere, Csaba (March 2012). Dissected: 2013 Cadillac ATS. Hearst Communications, Inc. ISBN 9781858941905. OCLC 38224673. Archived from the original on 2012-10-30. Retrieved 2012-11-21. {{cite book}}: |work= ignored (help)

[ccolu-16] [3]
"2015 Chevrolet Colorado Specifications". GM. Retrieved 2014-10-14.

[17] [4]
"TATA HEXA".

[uaz-18] [5]
"UAZ Patriot".

[bremach-19] [6]
"Bremach Suv".

[20] [7]
"GM Corporate Newsroom - United States - Home". media.gm.com. Retrieved 2016-10-26.

[1]

[lower-alpha 1]

[lower-alpha 2]

[lower-alpha 3]

[lower-alpha 4]

[lower-alpha 5]

[lower-alpha 6]

[lower-alpha 7]

[lower-alpha 8]

[lower-alpha 9]

[lower-alpha 10]

[lower-alpha 11]

[lower-alpha 1]

[lower-alpha 2]

[2]

[3]

[4]

[5]

[6]

[7]

	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^{[lower-alpha 1]}
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^{[lower-alpha 2]} Strasbourg · France GMPT^{[lower-alpha 2]} Toledo · Ohio · USA GMPT^{[lower-alpha 2]} Silao · Mexico

GM_6L_transmission

GM 6L transmission

Specifications

Basic concept

Technical data

Features

Applications

6L 45 MYA

6L 50 MYB

6L 80 MYC

6L 90 MYD

See also

References

External links

Share this article: