GM 9T50 transmission

Last updated
9TXX (9T45, 9T50, 9T60, 9T65)
Overview
Manufacturer General Motors
Production2019–present
Body and chassis
Class 9-speed transverse automatic transmission
Related Ford 8F
Chronology
Predecessor 6F35/6F50/6F55

The General Motors Hydra-Matic 9T50 and similar 9T45, 9T60, and 9T65 are part of the 9TXX family of electronic automatic transmissions with nine forward speeds for light-duty transversely-mounted applications. It was designed and manufactured by General Motors, equipped on automobiles starting with the 2017 model year; the 9TXX family was developed from an earlier joint GM–Ford 6-speed automatic transmission. Ford sells derivatives of the 9TXX with one forward speed removed as the 8F family.

Contents

Design / history

Ford and GM announced a joint venture to share automatic transmission designs in April 2013: GM would adopt a 10-speed longitudinal transmission primarily designed by Ford, and in exchange, Ford would adopt the GM 9TXX 9-speed transverse transmission. [1] Ford declined to use the GM 9TXX, however, as the promised improvement in fuel consumption was less than expected, and removed one gear, resulting in the Ford 8F family. [2] [3]

During the development of the 9TXX, GM received 60 new patents while building 800 prototypes. [4] It was developed from the 6T41 (Gen 3) [5] and designed to occupy approximately the same volume as that prior six-speed automatic and retain that transmission's on-axis design, which aligns all the planetary gears with the crankshaft. The addition of three gears was facilitated by adding a "selectable one-way clutch" which can act either as a sprag clutch, freewheeling in one direction and locking up in the other, or freewheeling in both directions. In addition, the transmission supports start-stop systems by including a spring-loaded hydraulic accumulator to engage the first-gear clutches upon restarting the engine. [6] The 8th gear ratio of the 9TXX corresponds to the 6th gear ratio of the 6T40, allowing lower engine speeds in 9th gear. [5] Two of the three planetary gear sets have similar designs between the 9TXX and 6T40; for the third, the 9TXX switches to a compound set. [7]

Models

9TXX gear ratios [8] [9]
123456789RFinal drive
4.693.313.012.451.921.451.000.750.622.962.89, 3.17, 3.32, 3.47, 3.63, 3.80

The last two digits of the model number indicate maximum GVWR and towing capacity, with higher numbers having a larger capacity. [9]

Model differences [9]
ModelMax. trailer weightMax. GVWR
9T451,743 kg (3,843 lb)2,700 kg (6,000 lb)
9T502,598 kg (5,728 lb)2,730 kg (6,020 lb)
9T603,080 kg (6,790 lb)
9T652,473 kg (5,452 lb)2,930 kg (6,460 lb)

9T45

Applications

9T50

The 9T50 and similar Ford 8F35 both share components with the GM 6T40 and Ford 6F35. [9]

Applications

2019- Cadillac XT4 (2.0 T LSY)

9T60

Applications

9T65

In December 2020, GM initiated a program to repair or replace 9T65 transmissions which were causing issues. Repairs were limited to external components only. [12] The program applied to vehicles that had less than 18,000 mi (29,000 km) and had been delivered within the past 18 months. [13] A recall was issued in March 2023 for certain crossover vehicles which may have a transmission that was assembled using an incorrectly sized sun gear. [14]

Applications

See also

Related Research Articles

<span class="mw-page-title-main">Chevrolet Tahoe</span> American sport utility vehicle

The Chevrolet Tahoe, and its badge-engineered GMC Yukon counterpart, are full-size SUVs and other trucks from General Motors, offered since 1994 and 1991, respectively. Since 1982, Chevrolet and GMC sold two different-sized SUVs under their "Blazer" and "Jimmy" nameplates, by introducing the smaller S-10 Blazer and GMC S-15 Jimmy for the 1983 model year, below the full-size Blazer and Jimmy models. This situation lasted into the early 1990s. GMC first rebadged the full-size Jimmy as the "Yukon" in 1991. Chevrolet however waited until 1994, when they rebadged the redesigned mid-size S-10 Blazer the "new Blazer," while renaming the full-size Blazer as the "Tahoe." The name Tahoe refers to the rugged and scenic area surrounding Lake Tahoe in the western United States, and was originally used as a trim level on S-10 models. The name Yukon refers to the Yukon territory of northern Canada.

<span class="mw-page-title-main">Chevrolet Colorado</span> Motor vehicle

The Chevrolet Colorado, is a series of compact pickup trucks marketed by American automaker General Motors. They were introduced in 2004 to replace the Chevrolet S-10 and GMC S-15/Sonoma compact pickups. The Colorado is named after the U.S. state of Colorado, while the Canyon took its name from the deep chasm between cliffs.

<span class="mw-page-title-main">Chevrolet Equinox</span> Compact crossover SUV

The Chevrolet Equinox is a crossover SUV introduced by Chevrolet in 2004 for the 2005 model year. It was intended to replace the North American Chevrolet Tracker and Chevrolet S-10 Blazer. The third-generation Equinox also replaced the first-generation Chevrolet Captiva.

<span class="mw-page-title-main">Chevrolet K5 Blazer</span> American sport utility vehicle

The Chevrolet K5 Blazer is a full-size sport-utility vehicle that was built by General Motors. Being GM's smallest full-size SUV, the K5 Blazer is part of the C/K truck series. Introduced to the Chevrolet line for the 1969 model year, the K5 Blazer was replaced for 1995 by the Chevrolet Tahoe. In 1970, GMC introduced its own model of the truck, called the Jimmy, which was discontinued in 1991 and replaced by the Yukon. The "Jimmy" name was chosen to reflect how GM may sound in a similar manner to how Jeep was thought to be a pronunciation of GP in the competing market. Both were short-wheelbase trucks and available with either rear- or four-wheel drive. Despite all Chevrolet versions from 1969 to 1988 having the "K5" badge, GM never internally referred to the model as the K5 Blazer/K5 Jimmy. Officially, the vehicles have always been referred to as the Blazer/Jimmy, without the K5 prefix. After the release of the S-Series Blazer/Jimmy in 1983, the models were officially renamed "Chevrolet Full-Size Blazer" and "GMC K-Jimmy", though they are often unofficially still addressed as "K5" to avoid confusion.

Turbo-Hydramatic or Turbo Hydra-Matic is the registered tradename for a family of automatic transmissions developed and produced by General Motors. These transmissions mate a three-element turbine torque converter to a Simpson planetary geartrain, providing three forward speeds plus reverse.

<span class="mw-page-title-main">GMC Acadia</span> Full-size crossover SUV

The GMC Acadia is a crossover SUV manufactured by General Motors for its GMC division. The first-generation GMC Acadia shared the GM Lambda platform with the Saturn Outlook, the Chevrolet Traverse, and the Buick Enclave. The Acadia went on sale in 2006 as a 2007 model in the United States, Canada and Mexico. The Acadia replaces three of the 7- or 8-seater vehicles on the Buick-Pontiac–GMC dealership network, the midsize GMC Safari van, the GMC Envoy, and the Pontiac Montana SV6 minivan for the domestic market. As of 2009, the Lambda vehicles had replaced the Buick Rainier, Buick Rendezvous, Buick Terraza, and the GMC Envoy XL and then subsequently the GMC Envoy, Chevrolet TrailBlazer and the Isuzu Ascender. A Denali version of the Acadia debuted for 2011. In 2017, the second generation Acadia was repositioned as a mid-size crossover utility vehicle in order to compete in the growing midsize SUV market against the likes of the Ford Explorer, Edge, and the Jeep Grand Cherokee.

<span class="mw-page-title-main">Buick Enclave</span> Full-size crossover SUV

The Buick Enclave is a three-row full-size crossover SUV produced by General Motors since 2007. It was previewed at the 2006 North American International Auto Show, officially as a concept car, making it the first Lambda vehicle to be displayed. The Enclave is partially based on the Buick Centieme concept shown at the 2003 Detroit Auto Show.

The 4L80-E is a series of automatic transmissions from General Motors. Designed for longitudinal engine configurations, the series included 4 forward gears. It was the 4-speed electronically commanded evolution of the 3-speed Turbo-Hydramatic 400, first produced in October 1963. 4L80-Es were optioned only in Chevrolet/GMC pickups, vans, and commercial vehicles, and the Hummer H1. It was also adopted by Rolls-Royce in 1991 and modified after extensive testing, and used initially in the Bentley Continental R, and subsequently other Rolls-Royce and Bentley vehicles. The 4L80 and 4L85 were built at Willow Run Transmission in Ypsilanti, Michigan.

The 4L60E is a series of automatic transmissions from General Motors. Designed for longitudinal engine configurations, the series includes 4 forward gears and 1 reverse gear. The 4L60E is the electronically commanded evolution of the Turbo-Hydramatic 700R4, originally produced in 1982.

The GM–Ford 6-speed automatic transmission is an automatic transaxle originally designed for transverse engine applications in cars. With design work having begun in 2002, General Motors and Ford Motor Company jointly committed to investing US$720 million in their manufacturing plants to support the new transmission.

<span class="mw-page-title-main">Romulus Engine</span> Automotive manufacturing facility

Romulus Engine is an automobile engine plant in Romulus, Michigan. Opened in 1976, the factory produces engines for General Motors vehicles. The factory receives cast engine blocks from Defiance Foundry in Defiance, Ohio and Saginaw Metal Casting Operations in Saginaw, Michigan.

<span class="mw-page-title-main">GM 6L transmission</span> Motor vehicle automatic transmission models

The 6L 50 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.

The Hydra-Matic 6T40 and similar 6T30, 6T45, and 6T50 are transversely-mounted six speed automatic transmissions produced by General Motors. The 6T40, referred to in GM inner circles as the GF6, made its debut in the 2008 Chevrolet Malibu, available with the 2.4 L LE5Ecotec engine making 164 horsepower (122 kW), and has since also been made available on the Chevrolet Cruze, Daewoo Tosca and Buick LaCrosse. It features clutch-to-clutch shifting, eliminating the bands used on older transmission designs. GM chose an "on-axis" design as opposed to folding the gearset behind the engine and transferring power through the use of a chain, as is used in most other GM front wheel drive transaxles. Ford Motor Company also produces their own variant, called the 6F35. The Buick Encore uses the 6F35 mated to the 1.4 turbo.

<span class="mw-page-title-main">Chevrolet Traverse</span> Full-size crossover SUV

The Chevrolet Traverse is a full-size crossover SUV with three-row seating built by General Motors. It is built on the same platform as the GMC Acadia and Buick Enclave, known as the Lambda platform for the first generation, and the C1XX for the second generation. It also shares the C1XX platform with the Cadillac XT6. It is the successor to the TrailBlazer body-on-frame SUV and the Uplander minivan.

The Ford–GM 10-speed automatic transmission is part of a joint venture between Ford Motor Company and General Motors to design and engineer two transmissions: a longitudinal 10-speed transmission and a transverse 9-speed trans-axle. Each company manufactures its own unique version of the transmissions in its own factories. The 10-speed transmission was designed by Ford, while the 9-speed transmission was designed by GM.

<span class="mw-page-title-main">Chevrolet Blazer (crossover)</span> American mid-size crossover SUV

The Chevrolet Blazer is a mid-size crossover SUV produced by General Motors under the Chevrolet marque. The vehicle went into production in December 2018 and sales began in January 2019 as a 2019 model. In China, a version with longer rear section and optional three-row seating is offered, which debuted in 2019 and went on sale in April 2020.

<span class="mw-page-title-main">Cadillac XT6</span> Luxury mid-size crossover SUV

The Cadillac XT6 is a mid-size luxury crossover SUV with three-row seating manufactured by General Motors. The vehicle was introduced on January 12, 2019, at the North American International Auto Show. It went on sale in June 2019 as a 2020 model.

The Ford 8F transmission is a family of automatic transmissions with eight forward speeds for light-duty transversely-mounted applications. It is designed and manufactured by Ford Motor Company starting in 2019; the 8F35 is derived from the General Motors 9TXX family, which in turn was developed from an earlier GM 6T40 transmission.

References

  1. ↑ Brooke, Lindsay (April 15, 2013). "Ford and GM finally consummate 9- and 10-speed joint development". Automotive Engineering. Archived from the original on March 25, 2018. Retrieved 12 December 2023.
  2. ↑ Martinez, Michael (April 23, 2018). "No thanks, Ford says to 9-speed offered by GM" . Automotive News. Retrieved 12 December 2023.
  3. ↑ Tracy, David (April 23, 2018). "Why Ford Isn't Using GM's Nine-Speed Automatic Transmission". Jalopnik. Retrieved 12 December 2023.
  4. ↑ Amend, James M. (December 7, 2016). "New 9-Speed Pushes Tech Limit, GM Says". Wards Auto. Retrieved 12 December 2023.
  5. 1 2 Riley, Mike (August 1, 2019). "General Motors 9T50 Nine Speed FWD: Part One". Transmission Digest. Retrieved 18 December 2023.
  6. ↑ Markus, Frank (October 7, 2016). "Peeking Inside the GM/Ford Transverse Nine-Speed Automatic". Motor Trend. Retrieved 18 December 2023.
  7. ↑ Riley, Mike (September 1, 2019). "General Motors 9T50 Nine Speed FWD: Part Two". Transmission Digest. Retrieved 18 December 2023.
  8. ↑ "General Motors 9T50 Nove Velocidades Treinamento Técnico" [General Motors 9T50 nine-speed technical training](PDF) (in Portuguese). Cambio Automatico do Brasil. Retrieved 12 December 2023.
  9. 1 2 3 4 Brayton, Bill (June 28, 2019). "Fun with transmissions: There's a New 9 Speed On The Block". Gears. Retrieved 12 December 2023.
  10. 1 2 3 4 "2021 GMC Trailering Guide" (PDF). General Motors. Retrieved 12 December 2023.
  11. 1 2 "All-New 2019 Blazer Arrives with Attitude" (PDF). TechLink. Vol. 21, no. 2. General Motors. January 2019. Retrieved 12 December 2023.
  12. ↑ McEachern, Sam (December 3, 2020). "GM Initiates Pilot Program To Replace 9T65 9-Speed Transmission". GM Authority. Retrieved 12 December 2023.
  13. ↑ "New 9T65 Transmission Replacement Pilot Program Bulletin Information" (PDF). TechLink. Vol. 23, no. 11. General Motors. June 2021. Retrieved 12 December 2023.
  14. ↑ Panait, Mircea (24 March 2023). "GM Built Certain 9-Speed Transmissions Incorrectly, Recalls 7,840 SUVs". Auto Evolution. Retrieved 12 December 2023.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.