The 8L90E fits only the GEN V LT1, LT4 or LT5 engines. A numerically higher 4.56 first gear ratio offers strong take-off performance while a double-overdrive sixth gear ratio of 0.65:1 helps optimize cruising efficiency. The 8L90E from Chevrolet Performance is equipped with a slip-yoke design tail shaft. Automatic Transmission Output Shaft, 8L90, Each. Part Number: ADO-24267251. Not Yet Reviewed. Estimated Ship Date: Monday 4/19/2021. Estimated Ship Date. 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. SuperMatic™ 8L90-E Eight-Speed Transmission Chevrolet Performance has adapted the production-based 8L90-E eight-speed automatic transmission for use with the LT1 and LT4 crate engines. A numerically high 4.56 first gear ratio offers strong take-off performance while a wide 7.0:1 overall ratio helps enhance cruising efficiency. 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-.
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.
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.
Navigation
8l90 Transmission For Sale
8L90 Gear Ratios | |
| 1ST | 4.56 |
| 2ND | 2.97 |
| 3RD | 2.08 |
| 4TH | 1.69 |
| 5TH | 1.27 |
| 6TH | 1.00 |
| 7TH | 0.85 |
| 8TH | 0.65 |
| Reverse | 3.82 |
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 Code | M5U |
| Manufacturer | GM |
| Production Years | 2015+ |
| Number of Gears | 8 forward |
| Maximum RPM | 7000 |
| Max Torque | 635 lb-ft |
| Max Horespower | 650 |
| Max Transmission Torque | 738 lb-ft |
| Length | |
| Case | 2 Piece Aluminum |
| Computer Control? | Yes, External TCM |
| Weight | 210+ Pounds |
| Max Shift Speed RPM | 7000 |
| Max GVW | 13,200 |
| Max GCVW | 20,500 |
| Tourqe converter | 258mm, locking |
| ATF | Dexron High Perormance |
8L90 Performance
8l90 Stand Alone Controller
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.
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 Model | Model Years | Final Drive Ratio | Notes |
| Cadillac Escalade [2] | 2015–2017 | 3.23 | |
2015–present | 2.41 | Standard | |
| 2.73 (Z51) | Z51 | ||
| Chevrolet Corvette (C7) Z06 [4] | 2015-current | 2.41 | |
2015–present | 3.23 | Standard | |
| 3.42 | Towing Pacage | ||
| GMC Yukon Denali/Denali XL | 2015–2017 | 3.23 | |
| Cadillac ATS-V | 2016–present | 2.85 | |
| Cadillac CTS-V | 2016–present | 2.85 | |
| Cadillac CT6 | 2016–present | 3.27 | |
| Chevrolet Camaro | 2016–present | 2.77 | |
| Chevrolet Colorado/GMC Canyon[6] | 2017–present | 3.42 |
| 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.
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]
