Product Description
The ATS 309-854-4308 Stage 5 Allison LCT1000 Transmission Package is a top-tier performance upgrade engineered for 2006-2007 GM trucks equipped with the 6.6L Duramax diesel engine (LLY, LBZ, and early LMM) and 4WD drivetrain. Built to handle extreme horsepower, heavy towing, and high-performance applications, this Stage 5 package delivers maximum strength, durability, and transmission control.
This complete ATS package includes a fully built Allison LCT1000 transmission featuring upgraded clutch packs, billet internal components, reinforced shafts, and precision calibration. It is paired with an ATS Five Star torque converter designed to improve torque multiplication, reduce slippage, and increase efficiency under load.
ATS also includes a deep transmission pan to increase fluid capacity and improve cooling, which is critical for maintaining performance and extending transmission life in demanding conditions. The Stage 5 package is designed for high-horsepower builds and aggressive towing setups where reliability is critical.
FAQ
What does the ATS Stage 5 Allison package include?
This package includes a fully built Stage 5 Allison LCT1000 transmission, ATS Five Star torque converter, and ATS deep transmission pan.
What makes the Stage 5 package different?
Stage 5 includes upgraded billet components, increased clutch capacity, and enhanced internal strength to handle extreme horsepower and torque levels.
Is this transmission suitable for high horsepower builds?
Yes. The Stage 5 package is designed specifically for high-performance diesel applications, including trucks with significant power upgrades.
Does this improve towing performance?
Absolutely. It is built for heavy towing, hauling, and demanding work conditions while maintaining reliability.
Will this fit my truck?
This package fits 2006-2007 GM Silverado and Sierra trucks equipped with the 6.6L Duramax diesel engine and 4WD Allison transmission.
FITMENT
2006-2007 Chevy Silverado 2500HD 6.6L Duramax LLY / LBZ / early LMM (4WD)
2006-2007 Chevy Silverado 3500HD 6.6L Duramax LLY / LBZ / early LMM (4WD)
2006-2007 GMC Sierra 2500HD 6.6L Duramax LLY / LBZ / early LMM (4WD)
2006-2007 GMC Sierra 3500HD 6.6L Duramax LLY / LBZ / early LMM (4WD)
Specifications for ATS 309-854-4308
| Specification | Details |
|---|---|
| Part Number | 309-854-4308 |
| Product Name | ATS Stage 5 Allison LCT1000 Transmission Package |
| Transmission Model | Allison LCT1000 Automatic |
| Engine Fitment | 6.6L Duramax (LLY / LBZ / early LMM) |
| Vehicle Fitment | 2006-2007 Chevy/GMC 2500HD & 3500HD |
| Drive Configuration | 4WD |
| Included Components | Stage 5 Built Transmission, Five Star Torque Converter, Deep Transmission Pan |
| Performance Level | Stage 5 (Extreme Duty / High Horsepower) |
| Material Upgrades | Billet Internal Components & Reinforced Shafts |
| UPC | Not Available |
| GTIN | Not Available |
| Shipping Information | Freight Shipping Required |
| Core Charge | Core Charge Applies |
| Prop 65 | WARNING: Cancer and Reproductive Harm |
