Product Description
The ATS 309-814-4332 Stage 1 Allison LCT1000 Transmission Package is a reliable performance upgrade for 2007.5–2010 6.6L LMM Duramax trucks equipped with 4WD. Designed as a heavy-duty replacement for the factory transmission, this package addresses common failure points while maintaining excellent drivability for daily use and towing applications.
This Stage 1 transmission is ideal for stock to mildly modified trucks, delivering improved clutch holding capacity, better heat management, and smoother, more consistent shifts. Whether you're towing heavy loads or looking for added reliability, ATS engineering ensures this transmission performs under pressure.
Built with upgraded internal components and backed by ATS’s extensive testing, this package provides long-lasting durability without sacrificing comfort or efficiency.
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 reliability and improved durability, while higher stages are built for significantly increased horsepower.
Q: Is this transmission good for towing?
A: Yes, this transmission is ideal for towing applications, offering improved clutch strength and heat control over stock.
Q: Does this include a torque converter?
A: Yes, this package includes an ATS performance torque converter designed to improve efficiency and torque transfer.
Q: What power level is this transmission rated for?
A: Stage 1 is best suited for stock to lightly modified trucks typically under 500 horsepower.
Fitment
- 2007.5 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (4WD)
- 2008 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (4WD)
- 2009 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (4WD)
- 2010 Chevrolet Silverado 2500HD/3500HD 6.6L LMM Duramax (4WD)
- 2007.5 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (4WD)
- 2008 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (4WD)
- 2009 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (4WD)
- 2010 GMC Sierra 2500HD/3500HD 6.6L LMM Duramax (4WD)
Key Features
- Designed for stock to mildly modified trucks
- Improved clutch holding capacity
- Enhanced durability over factory transmission
- ATS performance torque converter included
- Optimized for towing and daily driving
- Improved shift quality and consistency
- Built for long service life under load
Specifications for ATS 309-814-4332
| Specification | Details |
|---|---|
| Part Number | 309-814-4332 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 1 |
| Drivetrain | 4WD |
| Engine Compatibility | 6.6L Duramax LMM |
| Model Years | 2007.5 - 2010 |
| Horsepower Rating | Up to ~500 HP |
| 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 |
