Product Description
The ATS 309-834-4362 Stage 3 Allison LCT1000 Transmission Package is a premium performance upgrade for 2011–2016 6.6L LML Duramax trucks equipped with 4WD. Designed to significantly improve durability and reliability over the factory transmission, this package is ideal for daily drivers, towing applications, and moderately modified trucks.
Built with upgraded clutch packs, improved internal components, and ATS engineering expertise, the Stage 3 transmission provides increased torque capacity, smoother engagement, and more consistent performance under load. Paired with the ATS Five Star torque converter and deep transmission pan, this package enhances cooling and overall drivetrain efficiency.
This transmission is engineered for trucks running increased power levels while maintaining excellent drivability and long-term reliability, making it the perfect balance between performance and everyday usability.
FAQ
Q: What is the difference between Stage 3 and higher ATS stages?
A: Stage 3 is designed for moderate performance builds and towing, while higher stages include more billet components for extreme horsepower applications.
Q: Is this transmission good for towing heavy loads?
A: Yes, the Stage 3 package is an excellent choice for towing thanks to improved clutch capacity and better heat management.
Q: Does this include a torque converter?
A: Yes, it includes the ATS Five Star torque converter for improved torque transfer and efficiency.
Q: What horsepower levels can this support?
A: This transmission is ideal for trucks up to approximately 600–700 horsepower depending on tuning and supporting modifications.
Fitment
- 2011 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2012 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2013 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2014 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2015 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2016 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2011 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2012 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2013 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2014 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2015 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (4WD)
- 2016 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (4WD)
Key Features
- Designed for up to 600–700HP applications
- Improved clutch capacity over stock
- Enhanced durability for towing and daily driving
- ATS Five Star torque converter included
- Deep transmission pan for increased fluid capacity and cooling
- Improved shift quality and consistency
- Built specifically for 4WD applications
- Perfect for stock to moderately modified trucks
Specifications for ATS 309-834-4362
| Specification | Details |
|---|---|
| Part Number | 309-834-4362 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 3 |
| Drivetrain | 4WD |
| Engine Compatibility | 6.6L Duramax LML |
| Model Years | 2011 - 2016 |
| Horsepower Rating | Up to 700 HP |
| Torque Capacity | Increased over stock |
| Shipping Weight | Approximately 400 lbs |
| Shipping Method | Freight (Core Charge Applies) |
| Warranty | 5 Year / 500,000 Mile Limited Warranty |
| California Prop 65 | WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
