Product Description
The ATS 309-843-4272 Stage 4 Allison LCT1000 Transmission Package is a high-performance upgrade designed specifically for 2003–early 2004 6.6L LB7 Duramax trucks equipped with a 2WD drivetrain and PTO capability. Built to handle increased power while maintaining reliability, this transmission is ideal for towing, work trucks, and performance-driven applications.
This Stage 4 package strengthens the factory Allison platform with upgraded clutch packs, reinforced internal components, and precision engineering to deliver improved torque capacity and durability. The included ATS Five Star torque converter enhances power transfer and efficiency, while the deep transmission pan improves cooling under heavy load conditions.
Designed for demanding environments, this transmission provides firm, consistent shifts and is capable of supporting high horsepower builds without sacrificing drivability.
FAQ
Q: What is the advantage of the Stage 4 transmission over stock?
A: The Stage 4 includes upgraded clutches, improved internal strength, and better torque handling, making it far more durable than the factory transmission.
Q: What does PTO mean on this transmission?
A: PTO (Power Take-Off) allows the transmission to power auxiliary equipment such as hydraulic pumps, making it ideal for work trucks.
Q: Is this transmission suitable for towing?
A: Yes, it is built specifically for heavy-duty towing and work applications with improved cooling and strength.
Q: Does it include a torque converter?
A: Yes, it includes the ATS Five Star torque converter for optimal performance and durability.
Fitment
- 2003 Chevrolet Silverado 2500HD/3500HD 6.6L LB7 Duramax (2WD w/ PTO)
- 2003 GMC Sierra 2500HD/3500HD 6.6L LB7 Duramax (2WD w/ PTO)
- Early 2004 Chevrolet Silverado 2500HD/3500HD 6.6L LB7 Duramax (2WD w/ PTO)
- Early 2004 GMC Sierra 2500HD/3500HD 6.6L LB7 Duramax (2WD w/ PTO)
Key Features
- Designed for high-performance towing and work applications
- Increased torque capacity over stock transmission
- Upgraded clutch packs and internal components
- ATS Five Star torque converter included
- PTO (Power Take-Off) compatible design
- Deep transmission pan for improved cooling
- Improved shift quality and durability
Specifications for ATS 309-843-4272
| Specification | Details |
|---|---|
| Part Number | 309-843-4272 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 4 |
| Drivetrain | 2WD |
| PTO Compatibility | Yes |
| Engine Compatibility | 6.6L Duramax LB7 |
| Model Years | 2003 - Early 2004 |
| Horsepower Rating | Up to 750 HP |
| Torque Capacity | Up to 150% 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 |
