Product Description
The ATS 309-814-4440 Stage 1 Allison LCT1000 Transmission Package is a reliable performance upgrade for 2017–2019 6.6L L5P Duramax trucks equipped with 4WD. Designed to address common factory transmission weaknesses, this package improves durability, shift quality, and overall drivetrain reliability while maintaining excellent drivability for daily use and towing.
Built with upgraded clutch packs and precision calibration, the Stage 1 package is ideal for stock to mildly modified trucks. It provides increased torque holding capacity and smoother, more consistent shifting under load, making it perfect for work trucks, towing applications, and light performance builds.
This transmission package is engineered to extend the life of your Allison while delivering dependable performance without sacrificing comfort or efficiency.
FAQ
Q: What is the purpose of a Stage 1 transmission upgrade?
A: Stage 1 is designed to improve reliability and correct factory weaknesses while maintaining near-stock drivability.
Q: Is this transmission good for towing?
A: Yes, it is an excellent choice for towing, offering improved clutch holding capacity and better heat management.
Q: Does this include a torque converter?
A: Yes, this package includes an upgraded ATS torque converter designed for improved efficiency and durability.
Q: Is this suitable for tuned trucks?
A: Yes, it can handle mild tuning and performance upgrades, but higher stages are recommended for extreme horsepower builds.
Fitment
- 2017 Chevrolet Silverado 2500HD/3500HD 6.6L L5P Duramax (4WD)
- 2017 GMC Sierra 2500HD/3500HD 6.6L L5P Duramax (4WD)
- 2018 Chevrolet Silverado 2500HD/3500HD 6.6L L5P Duramax (4WD)
- 2018 GMC Sierra 2500HD/3500HD 6.6L L5P Duramax (4WD)
- 2019 Chevrolet Silverado 2500HD/3500HD 6.6L L5P Duramax (4WD)
- 2019 GMC Sierra 2500HD/3500HD 6.6L L5P Duramax (4WD)
Key Features
- Improved clutch capacity over stock
- Enhanced shift quality and consistency
- Designed for towing and daily driving
- Upgraded ATS torque converter included
- Increased durability and transmission lifespan
- Ideal for stock to mildly modified trucks
- Direct replacement with improved internal components
Specifications for ATS 309-814-4440
| Specification | Details |
|---|---|
| Part Number | 309-814-4440 |
| UPC | Not Available |
| GTIN | Not Available |
| Transmission Type | Allison LCT1000 Stage 1 |
| Drivetrain | 4WD |
| Engine Compatibility | 6.6L Duramax L5P |
| Model Years | 2017 - 2019 |
| Horsepower Rating | Supports Mild Performance Builds |
| 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 |
