Product Description
The ATS 309-835-4308 Stage 3 Allison LCT1000 Transmission Package is a high-performance upgrade designed for 2006–2007 6.6L LLY, LBZ, and LMM Duramax trucks equipped with 4WD and PTO capability. Built to significantly improve strength, reliability, and towing performance, this transmission package eliminates common factory weaknesses while maintaining excellent daily drivability.
Engineered for trucks that demand more than stock, the Stage 3 package includes upgraded clutch packs, improved valve body calibration, and the proven ATS Five Star torque converter. Whether you're towing heavy loads or running increased power levels, this transmission delivers consistent, firm shifts and enhanced durability under load.
This package is ideal for work trucks, towing applications, and moderately modified Duramax builds looking for dependable performance without stepping into extreme race-level setups.
FAQ
Q: What power level is the ATS Stage 3 transmission designed for?
A: The Stage 3 transmission is ideal for stock to moderately modified trucks, typically supporting up to around 600-650 horsepower depending on setup.
Q: What does PTO compatibility mean?
A: This transmission is designed to work with Power Take-Off (PTO) systems, making it ideal for utility, service, and work trucks that require auxiliary equipment operation.
Q: Is this transmission good for towing?
A: Yes, it is specifically designed to improve towing reliability, offering better clutch holding capacity and reduced heat under load.
Q: Does it include a torque converter?
A: Yes, it includes the ATS Five Star torque converter for improved torque multiplication and efficiency.
Fitment
- 2006 Chevrolet Silverado 2500HD/3500HD 6.6L LLY Duramax (4WD)
- 2006 Chevrolet Silverado 2500HD/3500HD 6.6L LBZ Duramax (4WD)
- 2006 GMC Sierra 2500HD/3500HD 6.6L LLY Duramax (4WD)
- 2006 GMC Sierra 2500HD/3500HD 6.6L 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)
Key Features
- Designed for towing and performance applications
- Supports up to ~650HP (build dependent)
- Upgraded clutch packs for increased holding capacity
- Modified valve body for improved shift quality
- ATS Five Star torque converter included
- PTO compatible for work truck applications
- Improved durability over stock transmission
- Optimized for daily driving and heavy-duty use
Specifications for ATS 309-835-4308
| Specification | Details |
|---|---|
| Part Number | 309-835-4308 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 3 |
| Drivetrain | 4WD |
| PTO Compatibility | Yes |
| Engine Compatibility | 6.6L Duramax LLY / LBZ / LMM |
| Model Years | 2006 - 2007 |
| Horsepower Rating | Up to ~650 HP |
| Primary Use | Towing / Performance / Work Truck |
| 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 |
