Buy ATS Diesel Performance Stage 6 Automatic Transmission Online
ATS Diesel Performance Stage 6 Automatic Transmission Package 309-963-4332 is a heavy-duty LCT1000 6-speed package made for 2008 to early 2010 GM HD 2500/3500 trucks with the 6.6L Duramax diesel engine, 2WD drivetrain, and PTO setup. Built for drivers who need serious strength, this package is designed for high-performance diesel use, demanding towing, and upgraded power applications.
The package includes an ATS Extreme LCT1000 6-speed automatic transmission with proprietary ATS components and modifications, an ATS 5 Star Viskus Clutch Drive torque converter, extra deep transmission pan, billet flex plate, billet input shaft, and billet 6 speed automatic transmission output shaft. These upgrades help improve power transfer, durability, Automatic Transmissions ATI201445 cooling support, and drivetrain confidence under heavy load.
This Stage 6 transmission package is a strong choice for performance truck owners, diesel workshops, and builders who want a complete upgraded transmission solution instead of a basic replacement. It is especially useful when the factory transmission gm 6 speed automatic transmission cannot keep up with added torque, heavy hauling, or aggressive driving.
Before ordering, confirm fitment, PTO requirement, core charge, installation needs, and supporting drivetrain components. Professional installation is recommended for best performance and reliability in demanding diesel truck applications, especially when 6 speed automatic transmission for chevy 350 towing, hauling, or running performance tuning regularly on modified work trucks.
Product Specifications
| Specification | Details |
|---|---|
| Brand | ATS Diesel Performance |
| Manufacturer Part Number | 309-963-4332 |
| Product Type | Stage 6 Automatic Transmission Package |
| Transmission Model | Allison LCT1000 6-Speed |
| Vehicle Fitment | 2008 to early 2010 GM HD 2500/3500 trucks |
| Engine Fitment | 6.6L Duramax Diesel / LMM Engine |
| Drive Type | 2WD |
| PTO Compatibility | Yes |
| Performance Level | Stage 6 / Extreme Duty / High Horsepower |
| Included Transmission | ATS Extreme LCT1000 6-Speed Automatic Transmission |
| Torque Converter | ATS 5 Star Viskus Clutch Drive Torque Converter |
| Transmission Pan | ATS Extra Deep Transmission Pan |
| Flex Plate | ATS Billet Flex Plate |
| Input Shaft | ATS Billet Input Shaft |
| Output Shaft | ATS Billet Output Shaft |
| Core Charge | May apply |
| Best Use | Heavy towing, high-performance diesel builds, and upgraded work trucks |
Product Benefits
- Complete Stage 6 upgrade package
This package includes the transmission, torque converter, deep pan, billet flex plate, billet input shaft, and billet output shaft. - Built for high-power Duramax trucks
It is designed for GM HD Duramax diesel trucks that need more strength than a stock transmission can provide. - Improved power transfer
The ATS 5 Star Viskus Clutch Drive torque converter helps deliver strong and efficient power transfer under load. - Better durability under stress
Billet input and output shafts help support strength in demanding towing, hauling, and performance use. - Extra cooling support
The ATS extra deep transmission pan helps increase fluid capacity and supports better heat control. - Good for towing and heavy-duty use
This package is suitable for trucks used for hauling, towing, and high-torque diesel applications. - Designed for 2WD PTO trucks
The package is made specifically for 2WD GM HD trucks with PTO compatibility. - Professional performance solution
It is a strong choice for diesel workshops, performance builders, and truck owners who want a serious drivetrain upgrade.
What vehicle does the ATS 309-963-4332 fit?
It is designed for 2008 to early 2010 GM HD 2500/3500 trucks with the 6.6L Duramax diesel engine, 2WD drivetrain, and PTO setup.
What is included in this Stage 6 transmission package?
The package includes an ATS Extreme LCT1000 6-speed transmission, ATS 5 Star Viskus Clutch Drive torque converter, extra deep pan, billet flex plate, billet input shaft, and billet output shaft.

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