Gm Transmissions

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The 8L90E is an 8 speed automatic transmission developed by General Motors and introduced for the 2015 Model year. It is currently phasing out the 6L80/6L90 transmissions (although it hasn’t done its all the way yet. Structurally, the 8L90 is similar to the 8L45, except that it is made to handle more power and torque.

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It is an incredibly advanced transmission and has the technology to perform at a high level in the Corvette, while at the same time being cost effective enough to use in high volume production.

The addition of two extra gears over the previous generation 6L80 was necessary to meet ever tightening Federal fuel economy laws. The addition of the two extra gears allows the 8L90 to realize a real world 5% fuel economy improvement over the 6L80.

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8L90 Gear Ratios

1ST4.56
2ND2.97
3RD2.08
4TH1.69
5TH1.27
6TH1.00
7TH0.85
8TH0.65
Reverse3.82

8L90E Specs

Like most GM automatic transmissions that have come before it, the 8L90E has an aluminum case, overdrive, and can handle a lot of power. Through a combination of lightweight materials and wizardry, GM engineers were able to get the 8L90 to weigh in a couple of pounds less than the 6L80E, and keep it roughly the same size.

The max power and torque specs bump up a little when it is put behind the LT1/LT4 engines. There’s more on this specific version of the transmission below. Or use this link to take you there.

8L90 Specifications

RPO CodeM5U
ManufacturerGM
Production Years2015+
Number of Gears8 forward
Maximum RPM7000
Max Torque635 lb-ft
Max Horespower650
Max Transmission Torque738 lb-ft
Length
Case2 Piece Aluminum
Computer Control?Yes, External TCM
Weight210+ Pounds
Max Shift Speed RPM7000
Max GVW13,200
Max GCVW20,500
Tourqe converter258mm, locking
ATFDexron High Perormance

8L90 Performance

The 8L90 has four different gears sets and five clutches. This allows for extremely tight shifts in a relatively small space. The 8L90 offers a true manual paddle shifting experience. And unlike the the Corvettes rivals at Porsche and Ferrari, the 8L90 also goes to work in pickup trucks. Thats a lot of range to engineer into one transmission.

  • All models come with adaptive shift control
  • Highly efficient axis binary pump
  • Performance algorithm shifting
  • Performs like a clutches gearbox in manual mode
  • Redline shift protection
  • Utilizes VFS to monitor clutch pressure for more precise shifts
  • Adapts to wear and tear and compensates electronically
  • Paddle shifting
  • Grade control

LT1 + LT4

The 8L90E is the transmission GM chose to put behind the ultra high performance LT1 engine. There are a few minor differences between the standard version and the LT1.

  • Max Torque is increased to 644 lb-ft
  • Gear ratios stay the same
  • LT1 uses a slip yoke design
  • LT4 uses a fixed yolk design

Identifying an 8L90E

The easiest way to determine if your vehicle is equipped with an 8L90 is to utilize the RP0 codes. They can be found in the glove compartment of the vehicle in question.

You’ll want to find the code M5U. That is proof positive that the vehicle in question was at a minimum equipped with the 8L90 from the factory.

Gm Transmissions Problems

8L90E Applications

Since the 8L90 has only been available for a few model years(production started in 2014 for the 2015 model year). It is not utilized in many vehicles. It is only used in high performance vehicles and performance cars, otherwise the 8L45 is more than enough for the job.

Make and ModelModel YearsFinal Drive RatioNotes
Cadillac Escalade [2]2015–20173.23
2015–present
2.41Standard
2.73 (Z51)Z51
Chevrolet Corvette (C7) Z06 [4]2015-current2.41
2015–present
3.23Standard
3.42Towing Pacage
GMC Yukon Denali/Denali XL2015–20173.23
Cadillac ATS-V2016–present2.85
Cadillac CTS-V2016–present2.85
Cadillac CT62016–present3.27
Chevrolet Camaro2016–present2.77
Chevrolet Colorado/GMC Canyon[6]2017–present3.42
Ford 10R80 · 10R140GM 10L80/10L90 · Allison 10L1000
Overview
ManufacturerFord · General Motors
Production2017–
Body and chassis
Class10-speed longitudinalautomatic transmission
Chronology
PredecessorGM 8L90
Ford 6R80 · 6R140

This 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 will manufacture its own unique version of the transmissions in their own factories.[1][2] The 10-speed transmission was designed by Ford, while GM designed the 9-speed transmission which is used in transverse applications.[3][4]

Specifications[edit]

Abstract[edit]

A unique triple-clutch assembly on a dedicated intermediate shaft, placed in the middle of the architecture, replaces two ordinary clutches and is the key for packaging the 10-speed trans into the same space as previous transmissions.[5] The transmission provides small steps between each gear ratio, improving performance and maximizing engine power during acceleration. A wide gear ratio spread and a lower numerical top gear ratio reduces engine speed at vehicle highway speeds, resulting in improved efficiency.

Technical Data[edit]

Gear Teeth and RatiosPlanetary Gearset: TeethCountTotalAvg.
Model

Type

Version

First Delivery

Sun 1

Ring 1

Sun 2

Ring 2

Sun 3

Ring 3

Sun 4

Ring 4

Brakes

Clutches

Ratio

Span

Gear

Step

Gear123456

(5)

7

(6)

8

(7)

910

(8)

R
Ford 10R80

GM 10LXX

800 Nm · 590 lb·ft[6] · 2017

900 Nm · 664 lb·ft · 2018

45

95

51

89

73

119

23

85

2

4

7.38641.2488
Ratio4.69572.98512.14621.76901.52011.27001.00000.85360.68920.6357- 4.8661
ZF 8HP

GM 8LXX[a]

For Comparison

Purposes Only

45

95

51

89

73

119

23

85

2

3

7.38641.3306
Ratio4.69572.98512.14621.76901.32821.00000.82110.6357- 3.1941
Ford

10R140

1400 Nm · 1033 lb·ft[7]

2020

58

122

50

86

69

111

26

94

2

4

7.29871.2471
Ratio4.61542.91862.13191.77331.51881.27731.00000.85140.68710.6324- 4.6951
GM Allison

10L1000

1356 Nm · 1000 lb·ft[8]

2020

53

103

53

91

65

103

26

92

2

4

7.18171.2449
Ratio4.53852.86812.06091.71531.48171.25831.00000.85060.68770.6319- 4.5448

Applications[edit]

Ford[edit]

10R60[edit]

  • 2020- Ford Explorer

10R80-MHT[edit]

  • 2020- Ford Explorer HEV
  • 2020- Lincoln Aviator HEV

10R80[edit]

  • 2017- Ford F-150
  • 2018- Ford Mustang
  • 2018- Ford Expedition
  • 2018- Lincoln Navigator
  • 2019- Ford Ranger
  • 2019- Ford Everest
  • 2019- Ford Mustang
  • 2020- Ford Transit
  • 2021- Ford Bronco
  • 2020- [Ford Endeavour]

10R140[edit]

  • 2020- Ford Super Duty

General Motors[9][edit]

10L80 MF6[edit]

  • 2018- Chevrolet Suburban RST
  • 2018- Cadillac Escalade
  • 2018- Chevrolet Tahoe
  • 2018- GMC Yukon Denali
  • 2019- Chevrolet Camaro SS
  • 2019- Chevrolet Silverado
  • 2019- GMC Sierra

10L90 MGL[edit]

  • 2017- Chevrolet Camaro ZL1
  • 2019- Cadillac CT6
  • 2020- Cadillac CT5
  • 2020- Cadillac CT4

10L100 (Allison) MGM/MGU[edit]

  • 2020- Chevrolet Silverado HD
  • 2020- GMC Sierra HD

Production[edit]

The 10R80 was first produced at the Ford Livonia Transmission Plant in Livonia, Michigan, and the Hydra-Matic 10L80 is made at the General Motors Romulus Powertrain Plant, in Romulus, Michigan.[10] Ford's Sharonville Transmission plant started 10R80 production in 2018 and is scheduled to start 10R140 production in 2019.[11]

Notes[edit]

  1. ^The 8-speed transmission shows the sole influence of the triple-clutch arrangement on the improvement in direct comparison to the two replaced normal clutches: which gears remain, which are new and which differ from the 8-speed design. Therefore, the same 4 planetary gearsets are applied. The manufacturing of an 8-speed transmission with these planetary gearsets is not intended.

References[edit]

Gm TransmissionsTransmissions
  1. ^'Ford and GM finally consummate 9- and 10-speed joint development - SAE International'. articles.sae.org. Archived from the original on 2018-03-25. Retrieved 2018-03-24.
  2. ^'Exclusive: An Inside Look At Ford's New 10 Speed Transmission - The Truth About Cars'. The Truth About Cars. 2014-12-01. Retrieved 2018-03-24.
  3. ^Martinez, Michael. 'No thanks, Ford says to 9-speed offered by GM'. Automotive News. Retrieved 8 July 2019.CS1 maint: discouraged parameter (link)
  4. ^Tracy, David. 'Why Ford Isn't Using GM's Nine-Speed Automatic Transmission'. Jalopnik. Retrieved 8 July 2019.CS1 maint: discouraged parameter (link)
  5. ^'Holy Shift! A Look inside GM's new 10-Speed Automatic - Advanced design, GM control system support capability, enhanced efficiency'. Retrieved 16 July 2019.CS1 maint: discouraged parameter (link)
  6. ^'F150Hub: Ford 10R80 Automatic Transmission Specs, Ratios'. Retrieved 15 July 2019.CS1 maint: discouraged parameter (link)
  7. ^'F450-XL Hub: Ford 10R140 Automatic Transmission Specs 2020, Ratios'. Retrieved 5 June 2020.CS1 maint: discouraged parameter (link)
  8. ^'GMC Sierra HD Specs 2020, Ratios'. Retrieved 7 June 2020.CS1 maint: discouraged parameter (link)
  9. ^'GM Global Propulsion Systems - USA Information Guide Model Year 2018'(PDF). General Motors Powertrain. Retrieved 6 February 2019.CS1 maint: discouraged parameter (link)
  10. ^Ford 10R80, GM 10L80 10 Speed Transmission - 10R80, 10L80 10 Speed Automatic Transmission Specs
  11. ^'New Programs Update May 2017'. @FordOnline. Ford. Retrieved 10 March 2019.CS1 maint: discouraged parameter (link)

Gm Transmission Mount

External links[edit]

Gm Transmissions Sale

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