Fits: 2004.5 thru 2005 Chevy Silverado/GMC Sierra 2500HD/3500HD LLY Duramax Diesel

Our Stage 4 Transmission Rebuild Kit is an outstanding value and more than capable of getting the job done. Perfect choice for the Duramax owner who is running some higher horsepower tunes, larger turbo, larger injectors/pump and is planning on taking the truck to the track a couple times a season. This kit does not include a torque converter, a billet converter is highly recommended with this kit if running in the 550-800HP range. The DmaxStore stage 4 is ready for almost anything you can throw at it with the stock bottom end.

Includes:

• Performance Clutch Kit (C1-C5)
  • ​Other kits on the market only provide C1-C4 Clutch Packs, We add the C5 pack at no extra cost to make this kit the most complete on the market.
• Valve Body Upgrades​
  • ​Transgo Shift Kit
  • Transgo Boost Valve Regulator Upgrade
  • Ratiotek Valve Body Upgrade Kit
• Housing and Transfer Case Adapter Gaskets

Optional:

• Install Kit: Includes all Gaskets/Thrust Washers/Hardware that we replace when building a Complete Allison in house.
• Electrical Parts: (We recommend replacing all electrical parts if you are rebuilding a transmission that has failed)
• Filter Kit includes:
  • DmaxStore Performance Spin on Filter
  • Allison Spin on Filter Magnet
  • Allison Internal Filter, standard or deep sump
    
• Billet PTO Cover Kit includes:
  • ​2x Custom Billet PTO Cover
  • 12x Stainless PTO Bolts
  • 2x PTO Cover Gaskets
    
• Allison Performance C2 Hub:
  • ​Designed to improve lubrication for the C2 clutches.
  • Lack of lubrication causes premature clutch wear especially when power has been increased

DmaxStore Note: 

• Dmaxstore does not recommend any aftermarket transmission tuning with our transmissions

• HP Rating given is with an upgraded Billet Torque Converter and Billet Internals