Product Description
The ATS 309-844-4332 Stage 4 Allison LCT1000 Transmission Package is a high-performance upgrade designed for 2007.5–2010 6.6L LMM Duramax trucks equipped with 4WD. Built to handle increased horsepower and torque demands, this package strengthens the factory Allison transmission with upgraded internals, improved clutch capacity, and precision-engineered components.
Perfect for daily drivers, heavy towing, and performance applications, the Stage 4 package delivers firmer shifts, improved durability, and greater torque holding capability without sacrificing drivability. The included ATS Five Star torque converter enhances power transfer efficiency while reducing slip under load.
This transmission is engineered to handle significantly more power than stock and is ideal for trucks with upgraded tuning, turbochargers, and fueling systems.
FAQ
Q: What is the difference between Stage 4 and Stage 5?
A: Stage 4 is designed for high-performance street and towing use, while Stage 5 includes additional billet hard parts for extreme horsepower and competition applications.
Q: Is this transmission suitable for towing heavy loads?
A: Yes, the Stage 4 package is built specifically to improve reliability and performance under heavy towing conditions.
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 power levels can this handle?
A: This transmission is typically rated for builds up to approximately 700–750 horsepower depending on setup.
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
- Rated up to approximately 750HP
- Increased clutch capacity for improved torque holding
- Upgraded internal components for durability
- ATS Five Star torque converter included
- Improved shift quality and performance
- Designed for towing, street, and performance use
- Built specifically for 4WD applications
Specifications for ATS 309-844-4332
| Specification | Details |
|---|---|
| Part Number | 309-844-4332 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 4 |
| Drivetrain | 4WD |
| Engine Compatibility | 6.6L Duramax LMM |
| Model Years | 2007.5 - 2010 |
| Horsepower Rating | Up to 750 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 |
