Product Description
Complete Allison Rebuild Performance for 2006-2010 6.6L Duramax
The ATS 313-921-4308 Allison Master Rebuild Kit is a comprehensive overhaul solution for 2006-2010 GM 6.6L Duramax trucks equipped with the Allison LCT-1000 6-speed automatic transmission. Designed to restore performance and improve long-term durability, this master kit is ideal for worn transmissions, towing applications, and higher-demand street or work trucks.
ATS builds this kit with the critical components needed for a serious Allison rebuild, including paper and rubber kit components, both internal and external filters, C1 through C4 Raybestos GPZ performance clutch frictions, steels, apply and pressure plate packs, an ATS pump kit, ATS trim valve kit, upgraded P1 sun gear bearing, ATS C-2 clutch drum spring kit, and upgraded C3 and C4 piston and piston retainer components. These upgraded parts target common wear points and help increase clutch holding power, improve hydraulic performance, and support transmission longevity.
Whether you're refreshing a high-mileage Allison or building a stronger transmission for towing and added power, this ATS master rebuild kit delivers the high-quality internal components needed to get the job done right.
Key Features:
- Master rebuild kit for 2006-2010 6.6L Duramax Allison applications
- Designed for Allison LCT-1000 6-speed automatic transmissions
- Includes internal and external filters, clutch frictions, steels, and pressure plate packs
- Features Raybestos GPZ performance clutch frictions
- Includes ATS pump kit and ATS trim valve kit
- Upgraded P1 sun gear bearing and C-2, C3, and C4 related components
- Built for improved durability, holding power, and rebuild quality
FAQ
What transmission does this kit fit?
This rebuild kit is designed for Allison LCT-1000 6-speed automatic transmissions used behind the 2006-2010 6.6L Duramax.
What makes this better than a basic rebuild kit?
This ATS master kit includes upgraded internal components such as Raybestos GPZ frictions, an ATS pump kit, trim valve kit, upgraded P1 sun gear bearing, and upgraded piston-related parts for a more complete and performance-focused rebuild.
Is this a good option for towing or added power?
Yes. The upgraded clutch and internal hard-part support make it a strong choice for trucks used for towing, heavy work, or performance applications.
Does this include everything needed for installation?
It includes the major internal rebuild components, but professional installers should always confirm any additional hard parts, fluids, or application-specific pieces needed during teardown.
Fitment:
- 2006-2010 Chevrolet Silverado 2500HD / 3500HD
- 2006-2010 GMC Sierra 2500HD / 3500HD
- 6.6L Duramax Diesel Engine
- Allison LCT-1000 6-Speed Automatic Transmission
Note: Always verify exact transmission and vehicle fitment before ordering.
Specifications for ATS 313-921-4308
| ATS 313-921-4308 Product Specifications | |
|---|---|
| Part Number | 313-921-4308 |
| Brand | ATS Diesel Performance |
| Product Type | Allison Master Rebuild Kit |
| Transmission Compatibility | Allison LCT-1000 6-Speed Automatic |
| Engine Compatibility | 6.6L Duramax |
| Vehicle Fitment | 2006-2010 Chevrolet Silverado / GMC Sierra 2500HD & 3500HD |
| Included Components | Paper and rubber kit, internal and external filters, C1-C4 Raybestos GPZ frictions, steels, apply/pressure plate packs, ATS pump kit, ATS trim valve kit, upgraded P1 sun gear bearing, ATS C-2 clutch drum spring kit, upgraded C3/C4 piston and piston retainer |
| UPC |
840440597421 |
| GTIN |
840440597421 |
| Shipping Info | Ships from manufacturer; shipping timing varies by seller |
| Core Charge |
$100 (Refundable)
|
| California Prop 65 |
P65Warnings.ca.gov (https://www.p65warnings.ca.gov/)
|
