DmaxStore Complete Stage 4 Allison Transmission (800 HP)


$6,299.00 Includes Free Shipping. +$1,950.00 core charge (refundable)

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DmaxStore Complete Stage 4 Transmission

Fits 2001-2016 Chevy/GMC 2500/3500 HD 4x4

HP Rating: 800 HP

*Built to order, normally 2-3 week lead time, please call for most up to date lead time*

Fully assembled, The Dmaxstore stage 4 transmission 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. The Dmaxstore stage 4 is ready for almost anything you can throw at it with the stock bottom end.

Your DmaxStore Performance Transmission will be built from start to finish by certified Allison technicians. 

The pride you take in your vehicle is the same pride we take in building each and every one of our DmaxStore Transmissions. We’re not happy until you are.

Every DmaxStore Performance Transmission is built with:

  • New Seals, Gaskets and O-rings
  • New Thrust Washers
  • New Bushings
  • New Clutches
  • New Filters
  • New Allison Deep Sump Pan (Optional DmaxStore High Capacity Transmission Pan)
  • New Genuine Allison Harness, Solenoids and Sensors
  • New Allison Performance C2 Hub
  • New Torque Converter

Stage 4 Transmission features:

  • Precision Industries Billet Triple Disc ML Converter ​(Provided Torque Converter Bolts must be used or damage may occur)
    • The Precision ML series is our #1 selling converter. An excellent choice for customers who primarily use their trucks for heavy towing, daily driving, and occasional drag racing or sled pulling. Performs great with stock or modified turbo's. Stall speed is very similar to stock approximately 1900 rpm. Its proprietary Triple Billet design makes it virtually indestructible.
  • Performance Clutch Kit (C1-C5)
    • ​Other builds on the market only provide C1-C4 Clutch Packs, We add the C5 pack at no extra cost to make this build the most complete on the market.
  • Valve Body Upgrades
    • ​Transgo Shift Kit (2001-2010 Trucks)
    • Transgo Boost Valve Regulator Upgrade (2001-2010 Trucks)
    • Ratiotek Valve Body Upgrade Kit (All Years)
  • 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.
  • Billet PTO Covers with Stainless Steel Bolts

Optional DmaxStore Transmission Pan

  • Cast aluminum construction with cooling fins for better heat dissipation
  • 1.35 Gallons of added Fluid Capacity over the stock pan for increased cooling
  • Built in filter lock to keep your internal filter in place
  • Textured Black powdercoat finish
  • Oversized Magnetic Drain Plug for hassle free oil changes
  • Port for additional oil temperature sensor (sold separately)

Optional Performance Billet Shafts:

  • Billet Output Shaft (Part# 29531252-X)
    • We recommend upgrading this output shaft for customers who will be doing boosted launches with high HP.
  • Billet Main Shaft (Part# 29536984-X)
    • We only recommend this intermediate/main shaft for those customers who will be producing over 1000HP and be racing most of the time.
    • Made from 9310 Vacumelt Steel Billets
    • Black oxided to reduce corrosion and ease of identification
    • Heat Treated for added  Strength
    • Shaft is precision ground
    • Made in the USA
  • Billet Input Shaft (Part# 29539506-X)
    • We recommend upgrading this input/turbine shaft for any customer towing making around 800HP.
    • Made from 9310 Vacumelt Steel Billets
    • Machined with larger radius turbine spline as compared to the OEM for added strength
    • 90 Degree chamfers removed for increase strength
    • Shot peened for increased strength
    • Black oxided to reduce corrosion and ease of identification
    • Heat Treated for added Strength
    • Shaft is precision ground
    • Made in the USA


DmaxStore Note:

  • This is a custom order part, once it has been processed, it CANNOT be canceled, returned, or refunded.
  • Please keep your transmission cooler line fittings and inspection cover from your core transmission.
  • 5 year unlimited mileage warranty on the Precision Torque Converter
  • 2 year unlimited mileage warranty for internally lubricated parts, seals, and gaskets including the Clutch Packs.
    • Subsequent damage caused by a failure external to the transmission internals is not covered under warranty.

Core Charge: $1950.00 is for the Allison Transmission, Torque Converter, and the Shipping Container it comes in. Cores will be inspected once received and the refund may be deducted if there is any damage to the hard parts.

***Free shipping to the lower 48 States***