Product Description
The ATS 309-834-4308 Stage 3 Allison LCT1000 Transmission Package is a performance-focused upgrade for 2006–2007 6.6L LLY, LBZ, and LMM Duramax trucks equipped with 4WD. Designed to significantly improve durability and holding capacity over the factory transmission, this package is ideal for daily drivers, towing applications, and moderate performance builds.
ATS enhances the Allison platform with upgraded clutch packs, improved internal components, and precision tuning to deliver firmer shifts, increased torque capacity, and longer transmission life. This Stage 3 package strikes the perfect balance between performance and reliability while maintaining smooth drivability.
Paired with the ATS Five Star torque converter, this transmission improves power transfer and efficiency while eliminating common factory slip and heat-related failures. Whether you're towing heavy loads or running increased power levels, this transmission is built to handle it with confidence.
FAQ
Q: What is the difference between Stage 3 and higher stages?
A: Stage 3 is designed for moderate horsepower builds and towing, while higher stages include more billet components for extreme horsepower applications.
Q: Is this transmission good for towing?
A: Yes, it is an excellent option for towing thanks to improved clutch holding capacity and reduced heat buildup.
Q: Does this include a torque converter?
A: Yes, it includes the ATS Five Star torque converter for improved torque multiplication and efficiency.
Q: What horsepower range can this handle?
A: This transmission is ideal for trucks up to approximately 600–700 horsepower depending on setup.
Fitment
- 2006 Chevrolet Silverado 2500HD/3500HD 6.6L LLY Duramax (4WD)
- 2006 Chevrolet Silverado 2500HD/3500HD 6.6L LBZ Duramax (4WD)
- 2006 GMC Sierra 2500HD/3500HD 6.6L LLY Duramax (4WD)
- 2006 GMC Sierra 2500HD/3500HD 6.6L LBZ Duramax (4WD)
- 2007 Chevrolet Silverado 2500HD/3500HD 6.6L LBZ Duramax (4WD)
- 2007 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (4WD)
- 2007 GMC Sierra 2500HD/3500HD 6.6L LBZ Duramax (4WD)
- 2007 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (4WD)
Key Features
- Designed for towing and moderate performance builds
- Improved clutch packs for increased holding capacity
- Enhanced internal durability over stock transmission
- ATS Five Star torque converter included
- Improved shift firmness and consistency
- Reduced transmission slippage and heat buildup
- Maintains smooth daily drivability
- Ideal for 600–700HP applications
Specifications for ATS 309-834-4308
| Specification | Details |
|---|---|
| Part Number | 309-834-4308 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 3 |
| Drivetrain | 4WD |
| Engine Compatibility | 6.6L Duramax LLY / LBZ / LMM |
| Model Years | 2006 - 2007 |
| Horsepower Rating | Up to 700 HP |
| Torque Capacity | Significantly 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 |
