Product Description
The ATS 309-845-4272 Stage 4 Allison LCT1000 Transmission Package is a high-performance upgrade designed for 2003–early 2004 6.6L LB7 Duramax trucks equipped with 4WD and PTO capability. Built to significantly outperform the factory Allison transmission, this package delivers increased strength, improved shift quality, and enhanced durability for both work and performance applications.
Engineered for trucks that demand reliability under heavy load, the Stage 4 transmission features upgraded clutch packs, reinforced internal components, and precision calibration. The included ATS Five Star torque converter improves torque multiplication and efficiency, while the ATS Co-Pilot controller optimizes line pressure and shift timing.
This transmission is ideal for towing, fleet use, and moderate-to-high horsepower builds, offering a major improvement in torque capacity and long-term reliability over stock units.
FAQ
Q: What is the difference between Stage 4 and Stage 5 transmissions?
A: Stage 4 is designed for high-performance towing and street applications, while Stage 5 includes additional billet internals for extreme horsepower and competition use.
Q: Does this transmission support PTO functionality?
A: Yes, this unit is specifically configured for vehicles requiring PTO (Power Take-Off) capability.
Q: Is this good for towing heavy loads?
A: Absolutely. The Stage 4 package is ideal for heavy towing with improved clutch holding capacity and reduced slip.
Q: Does it include a torque converter?
A: Yes, the ATS Five Star torque converter is included for maximum performance and durability.
Fitment
- 2003 Chevrolet Silverado 2500HD/3500HD 6.6L LB7 Duramax (4WD)
- 2003 GMC Sierra 2500HD/3500HD 6.6L LB7 Duramax (4WD)
- Early 2004 Chevrolet Silverado 2500HD/3500HD 6.6L LB7 Duramax (4WD)
- Early 2004 GMC Sierra 2500HD/3500HD 6.6L LB7 Duramax (4WD)
- Equipped with PTO (Power Take-Off)
Key Features
- Designed for high-performance towing and street use
- Increased torque capacity over stock transmission
- Upgraded clutch packs and internal components
- ATS Five Star torque converter included
- Compatible with PTO applications
- ATS Co-Pilot controller for optimized shifting
- Improved durability and heat management
- Ideal for work trucks and performance builds
Specifications for ATS 309-845-4272
| Specification | Details |
|---|---|
| Part Number | 309-845-4272 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 4 |
| Drivetrain | 4WD |
| PTO Compatible | Yes |
| Engine Compatibility | 6.6L Duramax LB7 |
| Model Years | 2003 - Early 2004 |
| Torque Capacity | Increased over stock (performance rated) |
| 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 |
