8l90



8L90
Overview
ManufacturerGeneral Motors
Production2014–present
Body and chassis
Class8-speed longitudinalautomatic transmission
Chronology
Predecessor6L80
SuccessorGM 10L90

8l90 Transmission Fluid Change

The 8L90 is an eight-speed automatic transmission built by General Motors Company. It is designed for use in longitudinal engine applications either attached to the front-located engine[1] with a standard bell housing or in the rear of the car adjacent to the differential (as in the Corvette). It is a hydraulic (hydramatic) design. GM also produces a similar design with the smaller 8L45.

8l90

The 8L90 is the subject of a class-action lawsuit filed in December 2018 that alleges the transmission suffers from persistent 'shudder' issues and that GM has known about the problems since its introduction and has failed to provide a solution, instead choosing to wait until the unit is out of warranty.[2]

8l90

The Hydra-Matic 8L90 (production code M5U) is a fuel-saving and electronically controlled eight-speed automatic transmission developed and produced by General Motors for use in rear-. 8L90 Transmission Performance Parts ALTO 8L90 Performance Transmission Rebuild Kit & Billet Input Shaft - Level 2 (Added Clutch Capacity) Instructions are included for C3, C4 & C5 Clutch Packs. However, if you're inexperienced with the 8L90 we recommend that you purchase a Service Manual.

Specifications[edit]

Gear Teeth and Ratios[3]Planetary 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

Gear12345678R
8L90

M5U

860 Nm · 635 lb·ft[4]

2014

41[5]

79

46

86

37

73

25

89

2

3

6.99911.3204
Ratio4.56002.97092.07511.68761.27001.00000.84550.6515- 3.8176
8L45

M5T

201541

79

41

79

41

79

26

94

2

3

7.01071.3208
Ratio4.61543.03852.06481.65831.25871.00000.84940.6583- 3.9278

Applications[edit]

8l90
Model yearsMake and modelFinal drive ratio
2015–2017Cadillac Escalade[6]3.23
2015–2019Chevrolet Corvette (C7) Stingray [7]2.41 (std)
2.73 (Z51)
2015–2019Chevrolet Corvette (C7) Z06 [8]2.41
2015–presentChevrolet Silverado/GMC Sierra[9]3.23 (std.)
3.42 (Max Trailering Package)
2015–2017GMC Yukon Denali/Denali XL3.23
2016–presentCadillac ATS-V2.85
2016–presentCadillac CTS-V2.85
2016–presentCadillac CT63.27
2016–presentChevrolet Camaro2.77
2017-presentChevrolet Express/GMC Savana (2.8L diesel engine only)
2015-presentChevrolet Colorado/GMC Canyon3.42

References[edit]

8l90e automatic transmission

8l90-e

  1. ^'USA Information Guide Model Year 2018'(PDF). Retrieved 15 July 2019.CS1 maint: discouraged parameter (link)
  2. ^'Class Action Lawsuit Filed Over Alleged Shifting Defect in Certain General Motors Transmissions'. Retrieved 2 February 2019.CS1 maint: discouraged parameter (link)
  3. ^'New 8-Speed Enables Quicker, More Efficient Corvette'. www.gm.com. General Motors. 20 August 2014. Archived from the original on 22 December 2014. Retrieved 21 August 2014.CS1 maint: discouraged parameter (link)
  4. ^'Transmission Repair Cost Guide'. Retrieved 15 July 2019.CS1 maint: discouraged parameter (link)
  5. ^'WIT · Whatever It Takes · Automatic Transmission Parts Catalog 2018+2019 Page 268'. Retrieved 15 July 2019.CS1 maint: discouraged parameter (link)
  6. ^'2015 Cadillac Escalade Updated with 8L90 8-Speed Automatic and More Tech [Photo Gallery]'. Retrieved 12 August 2014.CS1 maint: discouraged parameter (link)
  7. ^'Chevrolet Confirms 2015 Corvette Stingray To Utilize 8L90 Eight-Speed Gearbox'. Retrieved 9 April 2014.CS1 maint: discouraged parameter (link)
  8. ^'Supercharged 2015 Chevy Corvette Z06 takes the C7 beyond the ZR1 [w/video]'. Retrieved 25 January 2014.CS1 maint: discouraged parameter (link)
  9. ^'GM confirms 2015 Silverado, Sierra to get 8-speed automatic'. Retrieved 18 June 2014.CS1 maint: discouraged parameter (link)
Kit

External links[edit]


8l90

Retrieved from 'https://en.wikipedia.org/w/index.php?title=GM_8L90_transmission&oldid=946736172'




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