Product Description
The ATS 309-855-4290 Stage 5 Allison LCT1000 Transmission Package is a top-tier performance transmission solution engineered for 2004.5-2005 GM Silverado and Sierra trucks equipped with the 6.6L LLY Duramax diesel engine, 4WD drivetrain, and PTO. Designed for extreme power levels, heavy towing, and high-performance applications, this Stage 5 package delivers maximum strength, durability, and reliability.
This package includes a fully built ATS Stage 5 Allison LCT1000 transmission, ATS Five Star torque converter, and an ATS deep transmission pan. ATS upgrades the Allison platform with billet internal components, increased clutch capacity, and advanced calibration to handle significantly higher horsepower and torque than stock.
The included Five Star torque converter enhances torque multiplication, improves throttle response, and reduces slippage under load. The deep transmission pan increases fluid capacity and cooling efficiency, helping maintain optimal operating temperatures in demanding conditions.
Built for serious diesel enthusiasts, racers, and heavy-duty work trucks, the ATS Stage 5 Allison package is designed to handle extreme abuse while maintaining consistent performance and longevity.
FAQ
What is included in the ATS 309-855-4290 package?
This package includes a Stage 5 built Allison LCT1000 transmission, ATS Five Star torque converter, and ATS deep transmission pan.
What makes the Stage 5 transmission different?
Stage 5 transmissions include upgraded billet internal components, increased clutch capacity, and are built to handle extreme horsepower and torque levels.
Is this transmission suitable for high-performance builds?
Yes. This package is designed for high-horsepower applications, towing, racing, and heavy-duty use.
Does this unit support PTO?
Yes. This specific model is built for 4WD trucks equipped with PTO functionality.
Why upgrade to an ATS Stage 5 Allison transmission?
It significantly increases durability, torque capacity, and cooling performance compared to the factory transmission, making it ideal for demanding diesel applications.
FITMENT
2004.5-2005 Chevrolet Silverado 2500HD 6.6L LLY Duramax Diesel 4WD with PTO
2004.5-2005 Chevrolet Silverado 3500 6.6L LLY Duramax Diesel 4WD with PTO
2004.5-2005 GMC Sierra 2500HD 6.6L LLY Duramax Diesel 4WD with PTO
2004.5-2005 GMC Sierra 3500 6.6L LLY Duramax Diesel 4WD with PTO
Specifications for ATS 309-855-4290
| Specification | Details |
|---|---|
| Part Number | 309-855-4290 |
| Product Name | ATS Stage 5 Allison LCT1000 Transmission Package |
| Transmission Model | Allison LCT1000 Automatic |
| Engine Fitment | 6.6L LLY Duramax Diesel |
| Vehicle Fitment | 2004.5-2005 GM Silverado / Sierra 2500HD & 3500 |
| Drive Configuration | 4WD |
| PTO Compatibility | Yes |
| Included Components | Stage 5 Built Transmission, Five Star Torque Converter, Deep Transmission Pan |
| Performance Level | Stage 5 (Extreme Duty / High Horsepower) |
| UPC | Not Available |
| GTIN | Not Available |
| Shipping Information | Freight Shipping Required |
| Core Charge | Core Charge Applies |
| Prop 65 | WARNING: Cancer and Reproductive Harm |
