UP TO 650 HP
The 6L90E is the heavy-duty version of GM’s six-speed automatic transmission platform. Designed for increased torque capacity and demanding workloads, the 6L90E is commonly found in heavy-duty trucks and performance applications. Available in Godfather and Destroyer build levels, it offers exceptional durability when properly upgraded.
| Year Range | Make | Model | Engine | Notes |
|---|---|---|---|---|
| 2007-2019 | Chevrolet | Silverado 2500HD | 6.0L V8 | |
| 2007-2019 | GMC | Sierra 2500HD | 6.0L V8 | |
| 2009-2015 | Cadillac | CTS-V | 6.2L Supercharged V8 | |
| 2007-2019 | Chevrolet | Express 2500/3500 | 6.0L V8 | |
| 2007-2019 | GMC | Savana 2500/3500 | 6.0L V8 |
| Problem Name | Problem Description |
|---|---|
| Converter clutch wear is one of the most common causes of 6L90E failure. | 3-5-R Clutch Failure |
| Excessive heat and wear can damage the 3-5-R clutch assembly. | Valve Body Wear |
| Hydraulic wear can affect shift quality and clutch operation. | TCM Failure |
| Internal control modules can fail and cause transmission malfunctions. | Pump Failure |
| Pump wear can reduce pressure and cause transmission damage. |
| Gear | Ratio |
|---|---|
| 1st | 4.03:1 |
| 2nd | 2.36:1 |
| 3rd | 1.53:1 |
| 4th | 1.15:1 |
| 5th | 0.85:1 |
| 6th | 0.67:1 |
| Reverse | 3.06:1 |
