6L45 · 6L50
Overview
ManufacturerGeneral Motors
Production2006–present
Body and chassis
Class6-Speed Longitudinal Automatic Transmission
RelatedGM 6L80
Aisin AWTF-80 SC
Ford 6R
ZF 6HP
Chronology
Predecessor4L60-E · 4L65-E
5L40-E · 5L50
SuccessorGM 8L45

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 lb⋅ft (450 N⋅m) of torque and vehicles with a GVWR up to 5,000 pounds (2,300 kg).

Specifications

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 R 1 2 3 4 5 6
6L45
6L50		 450 N⋅m (332 lb⋅ft)
500 N⋅m (369 lb⋅ft)		 37
47		 47
97		 49
89		 2
3		 6.0346 1.4326
Ratio –3.2001 4.0650 2.3712 1.5506 1.1567 0.8532 0.6736
6L80 800 N⋅m (590 lb⋅ft) 35
46		 46
92		 50
94		 2
3		 6.0401 1.4329
Ratio –3.0638 4.0267 2.3635 1.5319 1.1522 0.8521 0.6667
ZF
6HP ALL		 31
38		 38
85		 37
71		 2
3		 6.0354 1.4327
Ratio –3.4025 4.1708 2.3397 1.5211 1.1428 0.8672 0.6911


Maximum engine power: 315 bhp (235 kW)

Maximum gearbox torque: 480 N⋅m (354 lb⋅ft)

Maximum shift speed: 7000 rpm

Maximum Validated Weight (GVW): 6,613 pounds (3,000 kg) Maximum Validated Weight (GCVW): 12,505 pounds (5,672 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

Applications

6L45

  • 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[1]
  • 2010–2013 : Cadillac SLS
  • 2012–2017 : Chevrolet Caprice PPV V6
  • 2011-2013: Holden VE Commodore, Calais, SV6
  • 2013-2017: Holden VF Commodore, Calais, SV6

6L50

See also

  • List of GM transmissions
  • "GM Launches More Fuel-Saving Six-Speed Automatic Transmissions". GM Media Online. Retrieved June 18, 2006.

References

  1. ↑ 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)
  2. ↑ "2015 Chevrolet Colorado Specifications". GM. Retrieved 2014-10-14.
  3. ↑ "TATA HEXA".
  4. ↑ "UAZ Patriot".
  5. ↑ "Bremach Suv".
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