GM 6L50 transmission

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6L45 · 6L50
Overview
ManufacturerGeneral Motors
Production2006–present
Body and chassis
Class6-Speed Longitudinal Automatic Transmission
RelatedGM 6L80 Transmission
Chronology
Predecessor4L60-E · 4L65-E
5L40-E · 5L50
Successor8L45 Transmission

The 6L50 (and similar 6L45) is a 6-speed longitudinally-mounted automatic transmission produced by General Motors. It is very similar in design to the larger 6L80/6L90, 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 6L50 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 6L45 version is used in certain BMW vehicles and the Cadillac ATS, as part of either rear-wheel drive and all-wheel drive powertrains.

The 6L50 is adaptable to rear-wheel drive and all-wheel drive applications. The 6L45 can accommodate engines with up to 332 ft·lbf (450 N·m) of torque and vehicles with a GVWR up to 5,000 lb (2,268 kg).

Specifications[edit]

Technical Data[edit]

Maximum engine power: 315 bhp (235 kw)

Maximum engine torque: 332 lb-ft (450 Nm)

Maximum gearbox torque: 480 lb-ft (651 Nm)


First: 4.060

Second: 2.370

Third: 1.550

Fourth: 1.160

Fifth: 0.850

Sixth: 0.670 Reverse: 3.200

Maximum shift speed: 7000 rpm

Maximum Validated Weight (GVW): 6613 lb (3000 kg) Maximum Validated Weight (GCVW): 12505 lb (5672 kg)

7-position quadrant: P, R, N, D, X, X, X (X = available calibratable range position)

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, 258 mm

Fluid type: DEXRON VI

Fluid capacity with 258 & 300 mm converter: 9.1 kg


Available Control Features

Multiple Shift Patterns (Selectable)

Driver Shift Control (Tap Up / Tap Down)

Enhanced Performance Algorithm Shifting (PAS)

Selectable Tow / Haul Mode

Engine Torque Management On All Shifts

Altitude and Temperature Compensation

Adaptive Shift Time

Neutral Idle

Reverse Lockout

Automatic Grade Braking


Additional Features

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 Strasbourg, France; GMPT Toledo, Ohio, USA; GMPT Silao, Mexico


Gear Teeth

and Ratios

Planetary Gearset: Teeth

Lepelletier Gear Mechanism

Count Total Avg.
Ravigneaux Simple
Type Sun 1.1

Ring 1.1

Sun 1.2

Ring 1.2

Sun 2

Ring 2

Brakes

Clutches

Ratio

Span

Gear

Step

Gear 1 2 3 4 5 6 R
6L50 37

47

47

97

49

89

2

3

6.0346 1.4326
Ratio 4.0650 2.3712 1.5506 1.1567 0.8532 0.6736 - 3.2001
6L80 35

46

46

92

50

94

2

3

6.0401 1.4329
Ratio 4.0267 2.3635 1.5319 1.1522 0.8521 0.6667 - 3.0638
ZF

6HP ALL

31

38

38

85

37

71

2

3

6.0354 1.4327
Ratio 4.1708 2.3397 1.5211 1.1428 0.8672 0.6911 - 3.4025

Applications[edit]

6L 45[edit]

6L50[edit]

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]

References[edit]

  1. ^ Csere, Csaba (March 2012). Dissected: 2013 Cadillac ATS. Car and Driver. Hearst Communications, Inc. ISBN 9781858941905. OCLC 38224673. Archived from the original on 2012-11-21. Retrieved 2012-11-21.
  2. ^ "2015 Chevrolet Colorado Specifications". GM. Retrieved 2014-10-14.
  3. ^ "https://en.wikipedia.org/wiki/UAZ_Patriot". External link in |title= (help); Missing or empty |url= (help)
  4. ^ "http://bremach.us/SUV.html". External link in |title= (help); Missing or empty |url= (help)