Product Description
The ATS 309-865-4290 Stage 6 Allison LCT1000 Transmission Package is a top-tier performance upgrade designed for 2004.5-2005 GM trucks equipped with the 6.6L LLY Duramax diesel engine, 4WD drivetrain, and PTO capability. Engineered for extreme power levels, heavy towing, and high-performance applications, this Stage 6 package delivers maximum strength, durability, and reliability well beyond factory limitations.
This complete ATS package includes a fully built Allison LCT1000 transmission, ATS Five Star torque converter, and supporting internal upgrades designed to handle significantly increased torque and horsepower. ATS reinforces critical internal components with billet parts, upgraded clutch packs, and precision machining to eliminate common failure points and provide consistent, dependable performance.
Designed for serious diesel enthusiasts, competition builds, and work trucks under extreme stress, the Stage 6 Allison transmission offers superior holding power, improved shift performance, and enhanced cooling capabilities to maintain reliability under the most demanding conditions.
FAQ
What is included in the ATS 309-865-4290 package?
This package includes a fully built ATS Stage 6 Allison LCT1000 transmission and ATS Five Star torque converter.
What makes the Stage 6 transmission different?
Stage 6 is designed for extreme horsepower and torque applications, featuring billet internal components, upgraded clutch packs, and enhanced durability.
Is this transmission good for towing?
Yes. It is built to handle heavy towing, hauling, and high-performance demands without sacrificing reliability.
Does this unit support PTO?
Yes. This specific model is designed for 4WD trucks equipped with PTO functionality.
Will this fit my truck?
This package fits 2004.5-2005 GM Silverado and Sierra HD trucks with the 6.6L LLY Duramax diesel engine, Allison transmission, and 4WD configuration.
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 309-865-4290
| Specification | Details |
|---|---|
| Part Number | 309-865-4290 |
| Product Name | ATS Stage 6 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 6 Built Transmission, Five Star Torque Converter |
| Performance Level | Stage 6 Extreme Duty |
| UPC | Not Available |
| GTIN | Not Available |
| Shipping Information | Freight Shipping Required |
| Core Charge | Core Charge Applies |
| Prop 65 | WARNING: Cancer and Reproductive Harm |
