Product Description
The ATS 309-812-4362 Stage 1 Allison LCT1000 Transmission Package is the ideal upgrade for 2011–2016 6.6L LML Duramax trucks looking for improved reliability and performance over stock. Designed as a heavy-duty replacement, this transmission package addresses common factory weaknesses while maintaining smooth drivability for daily use and towing.
Built with upgraded clutch materials, improved internal tolerances, and ATS engineering enhancements, this Stage 1 transmission increases durability and torque capacity without sacrificing comfort. It is perfect for lightly modified trucks, work applications, and towing setups that demand long-term dependability.
Paired with an ATS Five Star torque converter, this package delivers better power transfer, reduced slippage, and improved efficiency compared to the factory unit.
FAQ
Q: What is the difference between Stage 1 and higher ATS stages?
A: Stage 1 is designed as a performance-enhanced stock replacement, while higher stages include billet components and are built for significantly higher horsepower applications.
Q: Is this transmission good for towing?
A: Yes, Stage 1 is ideal for towing and daily driving, offering improved reliability and 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 durability.
Q: What power levels can this handle?
A: Stage 1 is designed for stock to mildly modified trucks and is not intended for extreme horsepower builds.
Fitment
- 2011 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2012 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2013 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2014 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2015 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2016 Chevrolet Silverado 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2011 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2012 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2013 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2014 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2015 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (2WD)
- 2016 GMC Sierra 2500HD/3500HD 6.6L LML Duramax (2WD)
Key Features
- Heavy-duty upgraded stock replacement transmission
- Improved clutch materials for increased durability
- Enhanced torque capacity over factory transmission
- ATS Five Star torque converter included
- Improved shift quality and drivability
- Designed for towing and daily driving applications
- Direct fit for LML Duramax trucks
Specifications for ATS 309-812-4362
| Specification | Details |
|---|---|
| Part Number | 309-812-4362 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 1 |
| Drivetrain | 2WD |
| Engine Compatibility | 6.6L Duramax LML |
| Model Years | 2011 - 2016 |
| Horsepower Rating | Stock to Mildly Modified Applications |
| Torque Capacity | Improved 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 |
