Product Description
The ATS 309-812-4332 Stage 1 Allison LCT1000 Transmission Package is the perfect upgrade for 2007.5–2010 6.6L LMM Duramax owners looking to improve reliability, towing performance, and everyday drivability. Designed as a direct replacement for the factory transmission, this package addresses common failure points while maintaining stock-like behavior.
This Stage 1 transmission is ideal for trucks with mild performance upgrades or those used for towing and heavy-duty work. It features upgraded clutch materials, improved sealing rings, and precision assembly to increase durability and extend transmission life without sacrificing smooth shifting characteristics.
Whether you're hauling, daily driving, or running light tuning, the ATS Stage 1 package delivers dependable performance with improved holding capacity over stock.
FAQ
Q: What is the purpose of a Stage 1 transmission?
A: Stage 1 is designed to improve reliability and handle mild power increases while maintaining near-stock drivability.
Q: Is this transmission good for towing?
A: Yes, it is ideal for towing applications and improves durability under load compared to 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 longevity.
Q: What power level can this handle?
A: Stage 1 is best suited for stock to mildly tuned trucks, typically up to approximately 450-500 horsepower.
Fitment
- 2007.5 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (2WD)
- 2008 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (2WD)
- 2009 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (2WD)
- 2010 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (2WD)
- 2007.5 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (2WD)
- 2008 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (2WD)
- 2009 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (2WD)
- 2010 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (2WD)
Key Features
- Designed for stock and mild performance applications
- Improved clutch materials for increased durability
- Enhanced sealing rings and internal upgrades
- Includes upgraded ATS torque converter
- Smooth, stock-like shifting characteristics
- Ideal for towing and daily driving
- Direct replacement for factory Allison transmission
Specifications for ATS 309-812-4332
| Specification | Details |
|---|---|
| Part Number | 309-812-4332 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 1 |
| Drivetrain | 2WD |
| Engine Compatibility | 6.6L Duramax LMM |
| Model Years | 2007.5 - 2010 |
| Horsepower Rating | Up to 500 HP (Estimated) |
| Torque Capacity | Increased over stock |
| Shipping Weight | Approximately 350-400 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 |
