Allison Transmission Stage 6 Rebuild Kit

ATS Allison Stage 6 Transmission Rebuild Kit – 313-906-4368

Fits 2011–2019 GM 2500HD / 3500HD with 6.6L Duramax (Allison 1000 Transmission)

The ATS 313-906-4368 Stage 6 Rebuild Kit is the perfect solution for high-performance daily drivers and heavy-duty towing rigs running the Allison 1000 transmission behind a 6.6L Duramax. This kit bridges the gap between street reliability and serious power-handling capability—perfect for trucks making up to 750HP while retaining smooth drivability.

Engineered with upgraded clutches, heavy-duty steels, and improved hydraulic control, the Stage 6 kit enhances transmission strength and shift performance under heavy load. Whether you're hauling, tuning, or prepping for performance mods, this kit provides the foundation to keep your Allison alive and thriving.

Key Features:

• Designed for 6.6L Duramax trucks with the Allison 1000 transmission

• Supports power levels up to 750 horsepower

• Improves clutch engagement and torque holding capacity

• Includes upgraded frictions, steels, seals, and gaskets

• Ideal for street performance, towing, and tuned applications

• Manufactured and tested by ATS Diesel Performance

• Compatible with stock converters or aftermarket upgrades

Kit Includes:

• Performance clutch and steel plates

• Complete gasket and seal set

• Upgraded C2 hub and pressure plate

• Modified pressure regulator components

• Pump and valve body upgrades for improved flow and pressure

• Installation instructions included

Fitment:
2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Chevrolet Silverado 2500HD / 3500HD
2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 GMC Sierra 2500HD / 3500HD
With 6.6L Duramax and Allison 1000 Transmission

Warranty:
Covered by ATS Diesel’s limited performance warranty. Professional installation is strongly recommended. Contact ATS for full details.