Product Description
The ATS 309-824-4290 Stage 2 Allison LCT1000 Transmission Package is the perfect upgrade for 2004.5–2005 6.6L LLY Duramax trucks looking for improved reliability, towing performance, and moderate power handling. Designed as a significant step above stock, this 4WD transmission package strengthens key internal components while maintaining smooth drivability for daily use.
This Stage 2 package is ideal for trucks with mild performance upgrades, offering increased clutch capacity, improved shift quality, and enhanced durability under load. Whether you're towing heavy trailers or running upgraded tuning, this transmission delivers dependable performance without sacrificing comfort.
Paired with the ATS Five Star torque converter, this package improves power transfer efficiency and reduces slippage, making it a solid choice for work trucks and daily drivers that demand more than factory limitations.
FAQ
Q: What is the difference between Stage 2 and higher ATS transmissions?
A: Stage 2 is designed for stock to mildly modified trucks, focusing on reliability and towing performance rather than extreme horsepower handling.
Q: Is this transmission good for towing?
A: Yes, it is specifically designed to improve towing capability with better clutch holding power and reduced heat buildup.
Q: Does this package include a torque converter?
A: Yes, it includes the ATS Five Star torque converter for improved efficiency and durability.
Q: What horsepower range is this designed for?
A: This transmission is ideal for stock to moderately upgraded trucks typically in the 400–600HP range.
Fitment
- 2004.5 Chevrolet Silverado 2500HD/3500HD 6.6L LLY Duramax (4WD)
- 2005 Chevrolet Silverado 2500HD/3500HD 6.6L LLY Duramax (4WD)
- 2004.5 GMC Sierra 2500HD/3500HD 6.6L LLY Duramax (4WD)
- 2005 GMC Sierra 2500HD/3500HD 6.6L LLY Duramax (4WD)
Key Features
- Designed for stock to moderate horsepower builds
- Improved clutch capacity over stock
- Enhanced shift quality and durability
- ATS Five Star torque converter included
- Improved towing performance and reliability
- Built for daily driving and work truck applications
- 4WD configuration
Specifications for ATS 309-824-4290
| Specification | Details |
|---|---|
| Part Number | 309-824-4290 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 2 |
| Drivetrain | 4WD |
| Engine Compatibility | 6.6L Duramax LLY |
| Model Years | 2004.5 - 2005 |
| Horsepower Rating | 400 - 600 HP |
| Torque Capacity | Improved over stock |
| Shipping Weight | Approximately 375 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 |
