Product Description
The ATS 309-833-4290 Stage 3 Allison LCT1000 Transmission Package is a high-performance upgrade designed for 2004.5–2005 6.6L LLY Duramax trucks equipped with a 2WD drivetrain and PTO capability. Built to significantly improve durability and torque handling over stock, this transmission package is ideal for towing, work trucks, and moderate performance builds.
This Stage 3 transmission features upgraded clutch packs, enhanced internal components, and improved hydraulic control to deliver firmer, more reliable shifts under load. The inclusion of a PTO provision makes it perfect for commercial and utility applications requiring auxiliary power take-off functionality.
Paired with the ATS Five Star torque converter and engineered for increased power capacity, this transmission ensures long-lasting performance while maintaining excellent drivability for daily use and heavy-duty demands.
FAQ
Q: What is the advantage of a Stage 3 transmission?
A: Stage 3 provides increased clutch capacity and upgraded internals, making it much stronger than stock while maintaining smooth drivability for towing and daily use.
Q: Does this transmission support PTO?
A: Yes, this unit is specifically built with PTO capability, making it ideal for work trucks and commercial applications.
Q: Is this good for towing?
A: Absolutely. This transmission is designed to handle heavy towing loads with improved reliability and reduced heat buildup.
Q: What horsepower level can this handle?
A: Stage 3 transmissions are typically suited for moderate performance builds up to approximately 600–700 horsepower depending on setup.
Fitment
- 2004.5 Chevrolet Silverado 2500HD/3500HD 6.6L LLY Duramax (2WD)
- 2004.5 GMC Sierra 2500HD/3500HD 6.6L LLY Duramax (2WD)
- 2005 Chevrolet Silverado 2500HD/3500HD 6.6L LLY Duramax (2WD)
- 2005 GMC Sierra 2500HD/3500HD 6.6L LLY Duramax (2WD)
Key Features
- Designed for towing, work trucks, and daily performance
- Upgraded clutch packs and internal components
- PTO (Power Take-Off) provision included
- ATS Five Star torque converter included
- Improved shift quality and durability
- Increased torque capacity over stock
- Enhanced hydraulic control system
- Ideal balance of strength and drivability
Specifications for ATS 309-833-4290
| Specification | Details |
|---|---|
| Part Number | 309-833-4290 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 3 |
| Drivetrain | 2WD |
| PTO Provision | Yes |
| Engine Compatibility | 6.6L Duramax LLY |
| Model Years | 2004.5 - 2005 |
| Horsepower Rating | Up to 650 HP (Estimated) |
| Torque Capacity | Increased 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 |
