Product Description
The ATS 309-825-4272 Stage 2 Allison LCT1000 Transmission Package is a heavy-duty upgrade designed for 2003–early 2004 6.6L LB7 Duramax trucks equipped with 4WD and PTO functionality. Built to address common factory transmission failures, this package delivers improved reliability, increased torque capacity, and enhanced shift performance for daily driving, towing, and work applications.
Featuring upgraded clutch packs, improved internal components, and the proven ATS Five Star torque converter, this Stage 2 transmission provides a significant performance boost over stock without sacrificing drivability. The added PTO compatibility makes it ideal for commercial and utility applications where auxiliary equipment is required.
This transmission is engineered to handle moderate horsepower increases while maintaining long-term durability and consistent performance under load.
FAQ
Q: What is the difference between Stage 2 and higher-stage ATS transmissions?
A: Stage 2 is designed for mild to moderate performance upgrades and improved durability, while higher stages include billet components for extreme horsepower applications.
Q: Is this transmission suitable for towing?
A: Yes, it is ideal for towing and work trucks, offering better clutch holding capacity and improved cooling over stock.
Q: Does this transmission support PTO operation?
A: Yes, this unit is specifically designed with PTO compatibility for commercial and auxiliary equipment use.
Q: Does it include a torque converter?
A: Yes, it includes the ATS Five Star torque converter for improved torque multiplication and efficiency.
Fitment
- 2003 Chevrolet Silverado 2500HD/3500HD 6.6L LB7 Duramax (4WD w/ PTO)
- 2003 GMC Sierra 2500HD/3500HD 6.6L LB7 Duramax (4WD w/ PTO)
- Early 2004 Chevrolet Silverado 2500HD/3500HD 6.6L LB7 Duramax (4WD w/ PTO)
- Early 2004 GMC Sierra 2500HD/3500HD 6.6L LB7 Duramax (4WD w/ PTO)
Key Features
- Improved clutch capacity over stock
- Enhanced internal durability and reliability
- ATS Five Star torque converter included
- PTO compatible for commercial applications
- Designed for towing, work trucks, and daily driving
- Smooth yet firm shift performance
- Increased torque holding capability
Specifications for ATS 309-825-4272
| Specification | Details |
|---|---|
| Part Number | 309-825-4272 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 2 |
| Drivetrain | 4WD |
| PTO Compatibility | Yes |
| Engine Compatibility | 6.6L Duramax LB7 |
| Model Years | 2003 - Early 2004 |
| Horsepower Rating | Up to ~600 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 |
