Product Description
The ATS 309-814-4308 Stage 1 Allison LCT1000 Transmission Package is the perfect entry-level performance upgrade for 2006–2007 6.6L Duramax LLY, LBZ, and LMM trucks equipped with 4WD. Designed to address common factory transmission weaknesses, this package delivers improved reliability, smoother shifting, and increased torque capacity while maintaining excellent daily drivability.
Built for trucks with mild performance upgrades or heavy towing demands, the ATS Stage 1 transmission enhances clutch holding capacity and overall durability without sacrificing comfort. This package is ideal for stock to moderately tuned Duramax applications looking for long-term dependability and improved transmission life.
Whether you're towing, hauling, or running light performance tuning, this transmission provides the confidence and strength needed to outperform the stock Allison unit.
FAQ
Q: What is the difference between Stage 1 and higher ATS stages?
A: Stage 1 is designed for stock to mildly upgraded trucks, focusing on improved durability and reliability without extreme performance components found in higher stages.
Q: Is this transmission good for towing?
A: Yes, it is ideal for towing applications and significantly improves reliability over the factory transmission.
Q: Does this include a torque converter?
A: Yes, this package includes an upgraded ATS torque converter designed for improved efficiency and durability.
Q: What power level can this transmission support?
A: This transmission is best suited for stock to moderately tuned trucks up to approximately 450–500 horsepower.
Fitment
- 2006 Chevrolet Silverado 2500HD/3500HD 6.6L LLY Duramax (4WD)
- 2006-2007 Chevrolet Silverado 2500HD/3500HD 6.6L LBZ Duramax (4WD)
- 2007 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (Classic Body) (4WD)
- 2006 GMC Sierra 2500HD/3500HD 6.6L LLY Duramax (4WD)
- 2006-2007 GMC Sierra 2500HD/3500HD 6.6L LBZ Duramax (4WD)
- 2007 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (Classic Body) (4WD)
Key Features
- Improved clutch capacity over stock
- Enhanced durability for towing and daily driving
- Upgraded ATS torque converter included
- Smoother, more consistent shifting
- Designed for stock to mild performance builds
- Direct replacement for factory Allison LCT1000
- Ideal for towing, work trucks, and daily drivers
Specifications for ATS 309-814-4308
| Specification | Details |
|---|---|
| Part Number | 309-814-4308 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 1 |
| Drivetrain | 4WD |
| Engine Compatibility | 6.6L Duramax LLY / LBZ / LMM |
| Model Years | 2006 - 2007 |
| Horsepower Rating | Up to 500 HP |
| 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 |
