Product Description
The ATS 309-864-4272 Stage 6 Allison LCT1000 Transmission Package is a top-tier performance solution designed for 2003 to early 2004 GM Silverado and Sierra trucks equipped with the 6.6L LB7 Duramax diesel engine and 4WD drivetrain. Built for extreme horsepower and torque applications, this Stage 6 package delivers unmatched strength, durability, and reliability for demanding towing, racing, and high-performance use.
This complete ATS package includes a fully built Stage 6 Allison LCT1000 transmission, ATS Five Star torque converter, and ATS deep transmission pan. ATS incorporates billet internal components, upgraded clutch packs, enhanced valve body calibration, and reinforced hard parts to dramatically increase torque capacity and eliminate common Allison transmission failures.
The included Five Star torque converter improves torque multiplication and lockup performance, while the deep transmission pan increases fluid capacity and cooling efficiency. This combination ensures consistent performance under heavy load and extreme operating conditions.
Designed for serious diesel enthusiasts, this package is ideal for trucks running higher horsepower tunes, heavy towing setups, or competitive applications where maximum transmission performance is required.
FAQ
What is included in the ATS 309-864-4272 package?
This package includes a Stage 6 built Allison LCT1000 transmission, ATS Five Star torque converter, and ATS deep transmission pan.
What makes a Stage 6 transmission different?
Stage 6 includes billet internal components, upgraded clutches, and extensive reinforcement to handle extreme horsepower and torque levels.
Is this transmission good for high horsepower builds?
Yes. This package is designed specifically for high-performance and extreme-duty applications.
Will this improve towing performance?
Absolutely. Increased torque capacity and improved cooling make it ideal for heavy towing and hauling.
Will this fit my truck?
This package fits 2003 to early 2004 GM 2500HD and 3500 trucks equipped with the LB7 Duramax engine and 4WD.
FITMENT
2003-2004 (Early) Chevrolet Silverado 2500HD 6.6L LB7 Duramax Diesel 4WD
2003-2004 (Early) Chevrolet Silverado 3500 6.6L LB7 Duramax Diesel 4WD
2003-2004 (Early) GMC Sierra 2500HD 6.6L LB7 Duramax Diesel 4WD
2003-2004 (Early) GMC Sierra 3500 6.6L LB7 Duramax Diesel 4WD
Specifications for ATS 309-864-4272
| Specification | Details |
|---|---|
| Part Number | 309-864-4272 |
| Product Name | ATS Stage 6 Allison LCT1000 Transmission Package |
| Transmission Model | Allison LCT1000 |
| Engine Fitment | 6.6L LB7 Duramax Diesel |
| Vehicle Fitment | 2003-Early 2004 GM HD Trucks |
| Drive Configuration | 4WD |
| Stage Level | Stage 6 |
| Included Components | Built Transmission, Five Star Torque Converter, Deep Transmission Pan |
| Performance Capability | Extreme Duty / High Horsepower Applications |
| UPC | Not Available |
| GTIN | Not Available |
| Shipping Information | Freight Shipping Required |
| Core Charge | Core Charge Applies |
| Prop 65 | WARNING: Cancer and Reproductive Harm |
