Product Description
The ATS 309-832-4290 Stage 3 Allison LCT1000 Transmission Package is a performance-built upgrade designed for 2004.5–2005 6.6L LLY Duramax trucks. Engineered to eliminate factory transmission weaknesses, this 2WD package delivers improved torque capacity, enhanced shift quality, and long-term durability for daily driving, towing, and moderate performance applications.
This Stage 3 transmission is ideal for truck owners looking to support increased horsepower without sacrificing reliability. Featuring upgraded clutch packs, valve body recalibration, and precision assembly, it provides smoother engagement and stronger holding power under load.
Paired with the ATS Five Star torque converter, this package improves power transfer efficiency while maintaining excellent drivability. Whether you're towing heavy loads or running upgraded tuning, this transmission is built to handle the demand.
FAQ
Q: What power level is the ATS Stage 3 transmission designed for?
A: The Stage 3 is designed for moderate performance builds and can typically support up to approximately 600–650 horsepower.
Q: Is this a good option for towing?
A: Yes, this transmission is excellent for towing applications, offering improved clutch holding capacity and reduced slip under load.
Q: Does this include a torque converter?
A: Yes, it includes the ATS Five Star torque converter for improved torque multiplication and efficiency.
Q: How does this compare to Stage 5?
A: Stage 3 is ideal for daily drivers and moderate builds, while Stage 5 is designed for extreme horsepower and competition use.
Fitment
- 2004.5 Chevrolet Silverado 2500HD/3500HD 6.6L LLY Duramax (2WD)
- 2005 Chevrolet Silverado 2500HD/3500HD 6.6L LLY Duramax (2WD)
- 2004.5 GMC Sierra 2500HD/3500HD 6.6L LLY Duramax (2WD)
- 2005 GMC Sierra 2500HD/3500HD 6.6L LLY Duramax (2WD)
Key Features
- Supports approximately 600–650HP
- Increased clutch capacity over stock
- Improved valve body calibration for firmer shifts
- ATS Five Star torque converter included
- Enhanced durability for towing and daily driving
- Designed for moderate performance applications
Specifications for ATS 309-832-4290
| Specification | Details |
|---|---|
| Part Number | 309-832-4290 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 3 |
| Drivetrain | 2WD |
| Engine Compatibility | 6.6L Duramax LLY |
| Model Years | 2004.5 - 2005 |
| Horsepower Rating | Up to 650 HP |
| Torque Capacity | Significantly increased over stock |
| Shipping Weight | Approximately 375-400 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 |
