Product Description
Complete Allison 5-Speed Rebuild Solution for 2001-2005 Duramax
The ATS 313-921-4248 Allison Master Rebuild Kit is designed for 2001-2005 6.6L Duramax trucks equipped with the Allison LCT-1000 5-speed automatic transmission. This master overhaul kit is built to restore transmission performance while adding strength and reliability for towing, work use, and performance-oriented applications.
ATS designed this rebuild kit to address common Allison wear points with upgraded internal components that help improve clutch holding power, hydraulic performance, and long-term durability. It is an ideal choice for high-mileage trucks, work trucks, and Duramax owners rebuilding a worn or slipping Allison transmission.
This kit includes critical rebuild components such as paper and rubber seals, internal and external filters, Raybestos GPZ performance clutch frictions, steel and apply/pressure plate packs, a converter drain back valve for 2003 and earlier applications, an ATS pump kit, an ATS trim valve kit, an upgraded P1 sun gear bearing, an ATS C-2 clutch drum spring kit, and upgraded C3 and C4 piston and piston retainer components.
Key Features:
- Master rebuild kit for Allison LCT-1000 5-speed transmissions
- Fits 2001-2005 6.6L Duramax applications
- Includes internal and external filters, seals, frictions, steels, and pressure plate packs
- Features Raybestos GPZ performance clutch friction material
- Includes ATS pump kit and ATS trim valve kit
- Upgraded P1 sun gear bearing and C-2, C3, and C4 related hard-part improvements
- Built for improved durability in towing, work, and performance use
FAQ
What transmission does this kit fit?
This kit is designed for the Allison LCT-1000 5-speed automatic transmission used behind the 2001-2005 6.6L Duramax.
Is this a complete transmission replacement?
No. This is a master rebuild kit intended to overhaul and upgrade your existing Allison transmission.
What makes this kit better than a basic rebuild kit?
This ATS kit includes upgraded performance and reliability components such as GPZ frictions, ATS pump and trim valve components, and multiple internal hard-part improvements beyond standard rebuild items.
Is this a good option for towing or tuned trucks?
Yes. This kit is well suited for towing, heavy-duty use, and applications where added clutch holding strength and reliability are important.
Fitment:
- 2001-2005 Chevrolet Silverado 2500HD / 3500HD
- 2001-2005 GMC Sierra 2500HD / 3500HD
- 6.6L Duramax Diesel Engine
- Allison LCT-1000 5-Speed Automatic Transmission
Note: Always verify fitment based on your exact transmission and vehicle configuration before ordering.
Specifications for ATS 313-921-4248
| ATS 313-921-4248 Product Specifications | |
|---|---|
| Part Number | 313-921-4248 |
| Brand | ATS Diesel Performance |
| Product Type | Allison Master Rebuild Kit |
| Transmission Compatibility | Allison LCT-1000 5-Speed |
| Engine Compatibility | 6.6L Duramax |
| Vehicle Fitment | 2001-2005 Silverado / Sierra 2500HD & 3500HD |
| Kit Contents | Paper and rubber kit, internal and external filters, C1-C4 Raybestos GPZ clutches, steels, apply/pressure plate packs, converter drain back valve (2003 and earlier), ATS pump kit, ATS trim valve kit, upgraded P1 sun gear bearing, ATS C-2 clutch drum spring kit, upgraded C3 and C4 piston and piston retainer |
| UPC |
840440597438 |
| GTIN |
840440597438 |
| Shipping | 17" x 17" x 13" |
| Core Charge | $100 Core Charge |
| California Prop 65 |
P65Warnings.ca.gov (https://www.p65warnings.ca.gov/)
|
