Английская Википедия:GM 8L transmission
Шаблон:Short description Шаблон:Infobox automobile
The 8L 45 is an eight-speed automatic transmission built by General Motors debuting in the 2016 Cadillac CT6. It is designed for use in longitudinal engine applications attached to the front-located engine[1] with a standard bell housing. It is a hydraulic (hydramatic) design sharing much with the 8L 90 transmission.[2] Estimated weight savings over the heavier duty 8L 90 is Шаблон:Convert. Gear ratios used enable a wide 7.0 ratio spread.
The 8L 90 is an eight-speed automatic transmission built by General Motors. 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 8L 45.
Specifications
Technical Data
| Gear Teeth and Ratios[3] | Planetary Gearset: TeethШаблон:Efn | Count | Total | Avg. | |||||
|---|---|---|---|---|---|---|---|---|---|
| Model Type |
Version First Delivery |
<math>{S_1}</math>Шаблон:Efn <math>{R_1}</math>Шаблон:Efn |
<math>{S_2}</math>Шаблон:Efn <math>{R_2}</math>Шаблон:Efn |
<math>{S_3}</math>Шаблон:Efn <math>{R_3}</math>Шаблон:Efn |
<math>{S_4}</math>Шаблон:Efn <math>{R_4}</math>Шаблон:Efn |
Brakes Clutches |
Ratio Span |
Gear Step | |
| Gear | R | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 8L 45 M5N |
Шаблон:Convert 2015Шаблон:Efn |
41 79 |
41 79 |
41 79 |
26 94 |
2 3 |
7.0107 | 1.3208 | |
| Ratio | –3.9278 | 4.6154 | 3.0385 | 2.0648 | 1.6583 | 1.2587 | 1.0000 | 0.8494 | 0.6583 |
| 8L 90 M5U |
Шаблон:Convert[4] 2014Шаблон:Efn |
41[5] 79 |
46 86 |
37 73 |
25 89 |
2 3 |
6.9991 | 1.3204 | |
| Ratio | –3.8176 | 4.5600 | 2.9709 | 2.0751 | 1.6876 | 1.2700 | 1.0000 | 0.8455 | 0.6515 |
| Ratio R & even |
<math>\tfrac{R_2 (S_3 S_4-R_3 R_4 )}{S_3 S_4 (S_2+R_2 )}</math> | <math>\tfrac{R_2 (S_4+ R_4 )}{(S_2+ R_2 ) S_4}</math> | <math>1+\tfrac{S_2 R_1}{S_1 (S_2+ R_2 )}</math> | <math>\tfrac{1}{1}</math> | <math>\tfrac{R_2 }{S_2 + R_2 }</math> | ||||
| Ratio odd |
<math>\tfrac{S_4+ R_4}{S_4}</math> | <math>\tfrac{(S_1+ R_1 ) (S_4+ R_4 )}{S_4 R_1+ S_1 (S_4+ R_4 )}</math> | <math>\tfrac{S_1 R_2 R_4 (S_3+R_3 ) + S_2 S_3 (S_1+R_1 ) (S_4+R_4 )}{S_1 R_4 (S_3 (S_2+R_2 )+R_2 R_3 )+S_2 S_3 S_4 (S_1+ R_1 )}</math> | <math>\tfrac{R_2 (S_3+ R_3 )}{R_2 (S_3+ R_3 )+ S_2 S_3 }</math> | |||||
Features
| 8L 45 M5N[6] | 8L 90 M5U · N8X[7] | |
|---|---|---|
| Input Capacity | ||
| Maximum engine power | Шаблон:ConvertШаблон:Efn | Шаблон:ConvertШаблон:Efn |
| Maximum gearbox torque | Шаблон:ConvertШаблон:Efn | Шаблон:ConvertШаблон:Efn |
| Maximum shift speed | 7,500/min | 6,000/min |
| Vehicle | ||
| Maximum Validated Weight Gross Vehicle Weight · GVW |
— | — |
| Maximum Validated Weight Gross Curb Vehicle Weight · GCVW |
Шаблон:ConvertШаблон:Efn | Шаблон:ConvertШаблон:Efn |
| Structure | ||
| Range-selector quadrant | P · R · N · D · M · L | |
| Case description | 2-piece main, bell integrated with main | |
| Case material | Die cast aluminum | |
| Shift pattern (2) | 2 on/off solenoids | |
| Shift quality | 6 Variable Force Solenoids · 1 for each clutch · 1 for TCC | |
| Torque converter clutch | Variable Force Solenoid ECCC · 2 path · turbine damper | |
| Converter size | Шаблон:Convert | Шаблон:Convert |
| Fluid type | DEXRON High Performance ATF | |
| Fluid capacity | Шаблон:ConvertШаблон:Efn | Шаблон:ConvertШаблон:Efn |
| Weight | Шаблон:ConvertШаблон:Efn | Шаблон:ConvertШаблон:Efn |
| Available Control Features | ||
| Shift Patterns | Multiple (Selectable) | |
| Driver Shift Control | Tap Up and Down | |
| Additional Modes | Tow & Haul Mode (Selectable) | |
| Engine Torque Management | On All Shifts | |
| Shift Control | Automatic Start/Stop Automatic Grade Braking | |
| Assembly sites | GMPTШаблон:Efn Toledo · Ohio · USA GMPTШаблон:Efn Silao · Mexico | |
Applications
8L 45
| Make | Model Years | Model | Final Drive Ratio |
|---|---|---|---|
| Cadillac | 2016–2019 | ATS | |
| 2016–2019 | CTS | ||
| 2020–present | CT4 | ||
| 2016–present | CT6 | ||
| Chevrolet | 2016–2019 | Camaro | |
| 2017–present | Colorado | ||
| GMC | 2017–present | Canyon |
8L 90
| Make | Model Years | Model | Final Drive Ratio |
|---|---|---|---|
| Cadillac | 2015–2017 | Escalade[8] | 3.23 |
| 2016–present | ATS-V | 2.85 | |
| 2016–present | CTS-V | 2.85 | |
| 2016–present | CT6 | 3.27 | |
| Chevrolet | 2015–2019 | Corvette (C7) Stingray[9] | 2.41Шаблон:Efn or 2.73Шаблон:Efn |
| 2015–2019 | Corvette (C7) Z06[10] | 2.41 | |
| 2015–present | Silverado[11] | 3.23Шаблон:Efn or 3.42Шаблон:Efn | |
| 2015–present | Colorado | 3.42 | |
| 2016–2018 | Camaro SS | 2.77 | |
| 2017–present | ExpressШаблон:Efn | ||
| GMC | 2015–2017 | Yukon Denali · Denali XL | 3.23 |
| 2015–present | Sierra[11] | 3.23 | |
| 2015–present | Canyon | 3.42 | |
| 2017–present | SavanaШаблон:Efn |
Lawsuits
The 8L 90 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.[12]
See also
References
External links
- General Motors Powertrain Division
- https://gmauthority.com/blog/gm/gm-transmissions/m5n/
- https://gmauthority.com/blog/gm/gm-transmissions/m5u/
- ↑ 1,0 1,1 Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ https://poweredsolutions.gm.com/products/8l45-8-speed-transmission/
- ↑ https://poweredsolutions.gm.com/products/8l90-8-speed-transmission/
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ 11,0 11,1 Шаблон:Cite web
- ↑ Шаблон:Cite web
