Product Description
The ATS 309-815-4308 Stage 1 Allison LCT1000 Transmission Package is a reliable, performance-enhanced upgrade designed for 2006–2007 6.6L Duramax LLY, LBZ, and LMM trucks equipped with 4WD and PTO functionality. Built to improve durability and correct common factory transmission weaknesses, this package is ideal for daily drivers, towing applications, and light performance upgrades.
Featuring upgraded clutch materials, recalibrated valve body components, and improved internal tolerances, the ATS Stage 1 transmission delivers smoother shifting, increased holding capacity, and longer service life compared to stock units. This package is perfect for trucks running mild tuning, towing heavy loads, or requiring dependable performance under demanding conditions.
Designed as a direct replacement, this transmission retains factory drivability while significantly improving reliability and torque handling for work or recreational use.
FAQ
Q: What is the benefit of a Stage 1 transmission upgrade?
A: Stage 1 improves clutch durability, shift quality, and overall lifespan without drastically altering drivability, making it ideal for stock to mildly modified trucks.
Q: Is this transmission suitable for towing?
A: Yes, it is specifically designed to handle towing stress better than the factory transmission.
Q: Does this unit support PTO functionality?
A: Yes, this transmission is built with PTO capability for work truck applications.
Q: What power levels can this handle?
A: Stage 1 is best suited for stock to mildly upgraded trucks, typically up to 450–500 horsepower.
Fitment
- 2006 Chevrolet Silverado 2500HD/3500HD 6.6L LLY/LBZ Duramax (4WD)
- 2006 GMC Sierra 2500HD/3500HD 6.6L LLY/LBZ Duramax (4WD)
- 2007 Chevrolet Silverado 2500HD/3500HD 6.6L LBZ/LMM Duramax (4WD)
- 2007 GMC Sierra 2500HD/3500HD 6.6L LBZ/LMM Duramax (4WD)
- Equipped with PTO (Power Take-Off)
Key Features
- Upgraded clutch packs for increased durability
- Improved valve body calibration for better shift quality
- Enhanced torque capacity over stock
- Maintains factory drivability
- PTO-compatible design for work applications
- Designed for towing and daily driving
- Direct replacement transmission package
Specifications for ATS 309-815-4308
| Specification | Details |
|---|---|
| Part Number | 309-815-4308 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 1 |
| Drivetrain | 4WD |
| PTO Compatibility | Yes |
| Engine Compatibility | 6.6L Duramax LLY / LBZ / LMM |
| Model Years | 2006 - 2007 |
| Horsepower Rating | Up to ~500 HP |
| Torque Capacity | Improved over stock |
| Shipping Weight | Approximately 400 lbs |
| Shipping Method | Freight (Core Charge Applies) |
| Warranty | 5 Year / 500,000 Mile Limited Warranty |
| California Prop 65 | WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
