Product Description
The ATS 309-855-4308 Stage 5 Allison LCT1000 Transmission Package is the ultimate high-performance upgrade for 2006-2007 GM trucks equipped with the 6.6L Duramax diesel engine and 4WD drivetrain with PTO. Built for extreme power levels, heavy towing, and demanding performance applications, this transmission package is engineered to deliver maximum durability, holding capacity, and long-term reliability.
This complete ATS package includes a fully built Stage 5 Allison LCT1000 transmission, ATS Five Star torque converter, and ATS deep transmission pan. ATS upgrades the Allison platform with billet internal components, reinforced clutch packs, upgraded valve body calibration, and increased line pressure to handle significantly higher horsepower and torque than stock.
The included Five Star torque converter improves torque multiplication and efficiency, while the deep transmission pan increases fluid capacity and cooling performance. This combination ensures optimal performance under heavy load, making it ideal for towing, racing, or high-horsepower diesel builds.
Designed for serious diesel enthusiasts and work trucks alike, the ATS Stage 5 Allison package is built to withstand the most demanding conditions while maintaining smooth, consistent shifting performance.
FAQ
What is included in the ATS 309-855-4308 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 includes upgraded billet internals, enhanced clutch capacity, increased line pressure, and calibration improvements for maximum power handling.
Is this suitable for high horsepower builds?
Yes. This package is specifically designed for high-performance applications, towing, and extreme-duty use.
Does this transmission support PTO?
Yes. This model is designed for 4WD trucks equipped with PTO functionality.
Will this fit my truck?
This package fits 2006-2007 GM Silverado and Sierra trucks with the 6.6L Duramax diesel engine and Allison transmission.
FITMENT
2006-2007 Chevrolet Silverado 2500HD 6.6L Duramax LLY / LBZ / LMM Diesel 4WD with PTO
2006-2007 Chevrolet Silverado 3500HD 6.6L Duramax LLY / LBZ / LMM Diesel 4WD with PTO
2006-2007 GMC Sierra 2500HD 6.6L Duramax LLY / LBZ / LMM Diesel 4WD with PTO
2006-2007 GMC Sierra 3500HD 6.6L Duramax LLY / LBZ / LMM Diesel 4WD with PTO
Specifications for ATS 309-855-4308
| Specification | Details |
|---|---|
| Part Number | 309-855-4308 |
| Product Name | ATS Stage 5 Allison LCT1000 Transmission Package |
| Transmission Model | Allison LCT1000 |
| Engine Fitment | 6.6L Duramax Diesel (LLY / LBZ / LMM) |
| Vehicle Fitment | 2006-2007 GM Silverado / Sierra 2500HD / 3500HD |
| Drive Configuration | 4WD |
| PTO Compatibility | Yes |
| Included Components | Stage 5 Built Transmission, Five Star Torque Converter, Deep Transmission Pan |
| Performance Level | Stage 5 (Maximum Performance) |
| Material | Billet & Heavy Duty Internal Components |
| UPC | Not Available |
| GTIN | Not Available |
| Shipping Information | Freight Shipping Required |
| Core Charge | Core Charge Applies |
| Prop 65 | WARNING: Cancer and Reproductive Harm |
