Product Description
Upgrade Your Allison LCT1000 to a 6-Speed Performance Transmission
The ATS 309-984-4308 LCT1000 Stage 1 6-Speed Package is designed to upgrade and strengthen your Allison transmission in 2006–2007 GM 4WD trucks equipped with the 8.1L gas or diesel engine. This package converts your transmission into a 6-speed configuration while improving durability, shift quality, and overall performance.
Factory Allison transmissions can struggle under increased load, towing, or performance applications. ATS addresses these limitations with a Stage 1 performance package that enhances clutch holding power, optimizes hydraulic performance, and delivers smoother, more reliable shifting.
This upgrade is ideal for daily drivers, tow rigs, and trucks requiring improved transmission strength without stepping into a full race build.
Key Features:
- Converts Allison LCT1000 to 6-speed operation
- Stage 1 upgrade for improved durability and performance
- Enhanced clutch holding capacity
- Improved shift quality and consistency
- Ideal for towing, hauling, and daily driving
- Designed specifically for GM 4WD applications
- Engineered by ATS Diesel Performance
FAQ
What does the Stage 1 package include?
This package includes upgraded internal transmission components and calibration improvements to support 6-speed functionality and increased durability.
What is the benefit of a 6-speed conversion?
A 6-speed transmission provides better gear spacing, improved drivability, and enhanced fuel efficiency compared to older 5-speed configurations.
Is this good for towing?
Yes, the improved clutch holding capacity and gear ratios make it an excellent upgrade for towing applications.
Is this a complete transmission?
This is a performance package designed for upgrading your existing Allison LCT1000 transmission.
Fitment:
- 2006–2007 Chevrolet Silverado 2500HD / 3500HD (4WD)
- 2006–2007 GMC Sierra 2500HD / 3500HD (4WD)
- 8.1L Gas Engine
- Duramax Diesel Engine
- Allison LCT1000 Transmission
Note: Fitment should always be verified based on drivetrain and transmission configuration.
Specifications for ATS 309-984-4308
| ATS 309-984-4308 Product Specifications | |
|---|---|
| Part Number | 309-984-4308 |
| Brand | ATS Diesel Performance |
| Product Type | LCT1000 Stage 1 6-Speed Package |
| Transmission Compatibility | Allison LCT1000 |
| Engine Compatibility | 8.1L Gas / Duramax Diesel |
| Drivetrain | 4WD |
| Vehicle Fitment | 2006–2007 Silverado / Sierra 2500HD & 3500HD |
| UPC | N/A |
| GTIN | N/A |
| Shipping Weight | Approx. 150 lbs |
| Shipping Dimensions | Freight Item - Contact for Details |
| Core Charge | Yes, refundable core charge applies |
| California Prop 65 | WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov |
