Product Description
The ATS 309-843-4290 Stage 4 Allison LCT1000 Transmission Package is a high-performance upgrade engineered for 2004.5–2005 6.6L LLY Duramax trucks equipped with a 2WD drivetrain and PTO capability. Designed to eliminate common factory transmission failures, this package delivers superior strength, reliability, and consistent performance under demanding towing and performance conditions.
This Stage 4 transmission is built with upgraded clutch packs, billet internal components, and precision calibration to significantly increase torque capacity and durability. The included ATS Five Star torque converter and Co-Pilot controller ensure optimized power transfer, improved shift quality, and enhanced drivability whether you're towing heavy loads or pushing increased horsepower.
Perfect for trucks running modified tuning or used in heavy-duty applications, this transmission provides a substantial upgrade over stock while maintaining excellent street manners and long-term reliability.
FAQ
Q: What is the difference between Stage 4 and Stage 5?
A: Stage 4 is designed for high-performance towing and moderate horsepower builds, while Stage 5 is built for extreme horsepower and competition-level applications.
Q: Does this transmission support PTO functionality?
A: Yes, this unit is specifically designed with PTO (Power Take-Off) compatibility for work truck applications.
Q: Is a torque converter included?
A: Yes, the ATS Five Star torque converter is included for improved torque multiplication and efficiency.
Q: What power levels can this handle?
A: This transmission is ideal for builds up to approximately 700–800 horsepower depending on setup.
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
- Designed for 700–800HP applications
- Increased clutch capacity for improved durability
- Billet internal upgrades for added strength
- PTO (Power Take-Off) compatible design
- ATS Five Star torque converter included
- Deep transmission pan for improved cooling
- ATS Co-Pilot controller for precise shift control
- Ideal for towing, work trucks, and performance builds
Specifications for ATS 309-843-4290
| Specification | Details |
|---|---|
| Part Number | 309-843-4290 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 4 |
| Drivetrain | 2WD |
| Engine Compatibility | 6.6L Duramax LLY |
| Model Years | 2004.5 - 2005 |
| Horsepower Rating | Up to 800 HP |
| Torque Capacity | Up to 150% over stock |
| PTO Compatible | Yes |
| 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 |
