Product Description
Upgrade to a Stronger 6-Speed Allison with ATS Stage 1 Performance
The ATS 309-983-4308 LCT1000 6-Speed Stage 1 Package is designed to upgrade your 2006-2007 GM 2WD 8.1L gas or diesel truck with improved durability, performance, and drivability. Built around the proven Allison LCT1000 platform, this ATS Stage 1 package delivers enhanced clutch holding power, smoother shifting, and increased reliability for towing and daily use.
ATS engineered this package to address factory limitations by upgrading internal components and optimizing shift performance. The result is a transmission that handles increased load demands while providing the benefits of a true 6-speed configuration for improved efficiency and performance.
This package is ideal for truck owners looking to extend transmission life, improve towing capability, and gain the advantages of a 6-speed Allison upgrade without stepping into higher-stage builds.
Key Features:
- Stage 1 performance package for Allison LCT1000
- 6-speed conversion for improved drivability and efficiency
- Increased clutch holding capacity
- Improved shift quality and consistency
- Ideal for towing, work trucks, and daily driving
- Designed specifically for 2WD GM 8.1L gas and diesel applications
- Backed by ATS Diesel Performance engineering
FAQ
What does the Stage 1 package include?
This package includes upgraded internal transmission components and calibration improvements to support increased power, durability, and 6-speed functionality.
What is the benefit of converting to a 6-speed?
A 6-speed configuration improves fuel efficiency, drivability, and keeps engine RPM in a more optimal range during towing and highway driving.
Is this suitable for towing?
Yes, this package is ideal for towing applications and work trucks that need improved reliability and performance.
Does this require professional installation?
Yes, installation involves transmission removal and internal work, and should be performed by a qualified technician.
Fitment:
- 2006–2007 GM Silverado / Sierra 2500HD & 3500 (2WD)
- 8.1L Gas Engine
- Select Diesel Applications with Allison LCT1000
- 2WD Allison LCT1000 Automatic Transmission
Note: Always verify compatibility with your specific drivetrain and transmission configuration before purchase.
Specifications for ATS 309-983-4308
| ATS 309-983-4308 Product Specifications | |
|---|---|
| Part Number | 309-983-4308 |
| Brand | ATS Diesel Performance |
| Product Type | LCT1000 6-Speed Stage 1 Transmission Package |
| Transmission Compatibility | Allison LCT1000 (2WD) |
| Drive Type | 2WD |
| Engine Compatibility | 8.1L Gas / Select Diesel |
| Vehicle Fitment | 2006–2007 GM Silverado / Sierra 2500HD & 3500 |
| UPC | N/A |
| GTIN | N/A |
| Shipping Weight | Freight Item (Contact for Details) |
| Shipping Dimensions | Freight Item |
| Core Charge | Yes – Refundable Core Charge Applies |
| California Prop 65 | WARNING: Cancer & Reproductive Harm - www.P65Warnings.ca.gov |
