Product Description
The ATS 309-852-4272 Stage 5 Allison LCT1000 Transmission Package is the ultimate upgrade for high-performance 2003–early 2004 6.6L LB7 Duramax trucks. Engineered to handle extreme horsepower and torque demands, this complete 2WD transmission package replaces factory weak points with race-proven billet components and precision tuning control.
Built for serious power, this transmission delivers significantly increased torque capacity, firmer shifts, and long-term reliability under towing, racing, or heavy-duty use. The included ATS Five Star torque converter and Co-Pilot controller ensure optimal performance and drivability in all conditions.
This is a complete, performance-built transmission capable of handling up to 950 horsepower while delivering up to 200% more torque capacity than stock.
FAQ
Q: What makes the ATS Stage 5 transmission better than stock?
A: It features billet shafts, upgraded clutch packs, and advanced control tuning to eliminate factory failure points and support extreme horsepower.
Q: Is this transmission good for towing?
A: Yes, it is designed for both heavy towing and high-performance applications with improved durability and cooling.
Q: Does this include a torque converter?
A: Yes, it includes the ATS Five Star torque converter for improved efficiency and power transfer.
Q: What power levels can this handle?
A: This transmission is rated for up to approximately 950 horsepower depending on setup.
Fitment
- 2003 Chevrolet Silverado 2500HD/3500HD 6.6L LB7 Duramax (2WD)
- 2003 GMC Sierra 2500HD/3500HD 6.6L LB7 Duramax (2WD)
- Early 2004 Chevrolet Silverado 2500HD/3500HD 6.6L LB7 Duramax (2WD)
- Early 2004 GMC Sierra 2500HD/3500HD 6.6L LB7 Duramax (2WD)
Key Features
- Rated up to 950HP
- Up to 200% increased torque capacity over stock
- Billet input, intermediate, and output shafts
- Billet P2 carrier and upgraded internal components
- ATS Five Star torque converter included
- Deep transmission pan for improved cooling
- ATS Co-Pilot controller for optimized shift control
- Designed for towing, racing, and high-performance use
Specifications for ATS 309-852-4272
| Specification | Details |
|---|---|
| Part Number | 309-852-4272 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 5 |
| Drivetrain | 2WD |
| Engine Compatibility | 6.6L Duramax LB7 |
| Model Years | 2003 - Early 2004 |
| Horsepower Rating | Up to 950 HP |
| Torque Capacity | Up to 200% 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 |
