Product Description
The ATS 309-814-4362 Stage 1 Allison LCT1000 Transmission Package is a premium upgrade designed for 2011–2016 6.6L LML Duramax trucks equipped with 4WD. Built as a heavy-duty replacement for the factory transmission, this package enhances durability, improves shift quality, and increases torque capacity while maintaining excellent drivability for daily use and towing applications.
Perfect for stock to mildly modified trucks, the Stage 1 transmission eliminates common factory weaknesses and delivers smoother, more consistent performance under load. Featuring upgraded clutch packs, improved valve body calibration, and the ATS Five Star torque converter, this package ensures reliable power transfer and long-term dependability.
This transmission is ideal for work trucks, towing setups, and performance builds that require improved strength without going to extreme race-level components.
FAQ
Q: What is the difference between Stage 1 and higher ATS stages?
A: Stage 1 is designed for stock to mildly modified trucks, focusing on improved durability and drivability, while higher stages include billet internals for high horsepower applications.
Q: Is this transmission good for towing?
A: Yes, Stage 1 is an excellent choice for towing, offering improved clutch holding capacity and better heat management over stock.
Q: Does this include a torque converter?
A: Yes, it includes the ATS Five Star torque converter for improved efficiency and torque multiplication.
Q: Do I need tuning with this transmission?
A: Tuning is not required but can help maximize performance and shift quality.
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)
- 2011-2016 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (4WD)
Key Features
- Designed for stock to mildly modified trucks
- Increased torque holding capacity over factory transmission
- Upgraded clutch packs and internal components
- Improved valve body calibration for better shift quality
- ATS Five Star torque converter included
- Excellent for towing and daily driving
- Enhanced durability and reliability
Specifications for ATS 309-814-4362
| Specification | Details |
|---|---|
| Part Number | 309-814-4362 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 1 |
| Drivetrain | 4WD |
| Engine Compatibility | 6.6L Duramax LML |
| Model Years | 2011 - 2016 |
| Horsepower Rating | Up to 500 HP (Recommended) |
| 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 |
