| 8L90 | |
|---|---|
| Overview | |
| Manufacturer | General Motors |
| Production | 2014–present |
| Body and chassis | |
| Class | 8-speed longitudinalautomatic transmission |
| Chronology | |
| Predecessor | 6L80 |
| Successor | GM 10L90 |
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.
8ll Transmission
Change transmission fluid where severe dirt conditions exist: Every 1,000 hours: Change transmission fluid (Normal off-highway use) Heavy Duty Engine Lubricant or Mineral. Fuller®On/Off-Highway Transmissions RT-8908LL RTO-11908LL More time on the road™ RTO-14908LL RTO-16908LL The Fuller®8LL Transmissions 8 plus 2 Versatility for On/Off-Highway Applications and Demanding On-Highway Duty. Eight road speed gears and two ad di tion al deep reduction ratios in low and reverse for on/off-highway versatility. Eaton Fuller 8ll Transmission Diagram Ebook Title: Eaton Fuller 8ll Transmission Diagram - Read Eaton Fuller 8ll Transmission Diagram PDF on your Android, iPhone, iPad or PC directly, the following PDF file is submitted in 7 Jan, 2020, Ebook ID PDF-9EF8TD18. Download full version PDF for Eaton Fuller 8ll Transmission Diagram using the link below. New Truck, 8LL Trans Discussion in 'Trucks Eighteen Wheelers ' started by racerx22288, Mar 6, 2008. Page 1 of 3 1 2 3 Next Mar 6, 2008 #1. Buyer acknowledges and agrees that all equipment / parts are sold as is / where is without guarantee or warranty of any kind, either expressed or implied.
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]
Specifications[edit]
| Gear Teeth and Ratios[3] | Planetary Gearset: Teeth | Count | Total | Avg. | |||||
|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| Gear | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | R |
| 8L90 M5U | 860 Nm · 635 lb·ft[4] 2014 | 41[5] 79 | 46 86 | 37 73 | 25 89 | 2 3 | 6.9991 | 1.3204 | |
| Ratio | 4.5600 | 2.9709 | 2.0751 | 1.6876 | 1.2700 | 1.0000 | 0.8455 | 0.6515 | - 3.8176 |
| 8L45 M5T | 2015 | 41 79 | 41 79 | 41 79 | 26 94 | 2 3 | 7.0107 | 1.3208 | |
| Ratio | 4.6154 | 3.0385 | 2.0648 | 1.6583 | 1.2587 | 1.0000 | 0.8494 | 0.6583 | - 3.9278 |
Applications[edit]
| Model years | Make and model | Final drive ratio |
|---|---|---|
| 2015–2017 | Cadillac Escalade[6] | 3.23 |
| 2015–2019 | Chevrolet Corvette (C7) Stingray [7] | 2.41 (std) |
| 2.73 (Z51) | ||
| 2015–2019 | Chevrolet Corvette (C7) Z06 [8] | 2.41 |
| 2015–present | Chevrolet Silverado/GMC Sierra[9] | 3.23 (std.) |
| 3.42 (Max Trailering Package) | ||
| 2015–2017 | GMC Yukon Denali/Denali XL | 3.23 |
| 2016–present | Cadillac ATS-V | 2.85 |
| 2016–present | Cadillac CTS-V | 2.85 |
| 2016–present | Cadillac CT6 | 3.27 |
| 2016–present | Chevrolet Camaro | 2.77 |
| 2017-present | Chevrolet Express/GMC Savana (2.8L diesel engine only) | |
| 2015-present | Chevrolet Colorado/GMC Canyon | 3.42 |
References[edit]
- ^'USA Information Guide Model Year 2018'(PDF). Retrieved 15 July 2019.CS1 maint: discouraged parameter (link)
- ^'Class Action Lawsuit Filed Over Alleged Shifting Defect in Certain General Motors Transmissions'. Retrieved 2 February 2019.CS1 maint: discouraged parameter (link)
- ^'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)
- ^'Transmission Repair Cost Guide'. Retrieved 15 July 2019.CS1 maint: discouraged parameter (link)
- ^'WIT · Whatever It Takes · Automatic Transmission Parts Catalog 2018+2019 Page 268'. Retrieved 15 July 2019.CS1 maint: discouraged parameter (link)
- ^'2015 Cadillac Escalade Updated with 8L90 8-Speed Automatic and More Tech [Photo Gallery]'. Retrieved 12 August 2014.CS1 maint: discouraged parameter (link)
- ^'Chevrolet Confirms 2015 Corvette Stingray To Utilize 8L90 Eight-Speed Gearbox'. Retrieved 9 April 2014.CS1 maint: discouraged parameter (link)
- ^'Supercharged 2015 Chevy Corvette Z06 takes the C7 beyond the ZR1 [w/video]'. Retrieved 25 January 2014.CS1 maint: discouraged parameter (link)
- ^'GM confirms 2015 Silverado, Sierra to get 8-speed automatic'. Retrieved 18 June 2014.CS1 maint: discouraged parameter (link)
External links[edit]
Eaton Fuller 8ll Transmission Troubleshooting