Diesels Unlimited Transmission Builds. Stock to Comp

Diesels Unlimited Allison 1000 Transmission Builds

Looking for a transmission you can trust behind your Duramax? Diesels Unlimited Allison 1000 builds are designed for everything from stock daily drivers to full competition trucks. Each build is assembled with upgraded clutches, steels, and hydraulic improvements depending on your power level and usage.

Select your build level below and pricing will be added automatically.

What’s Included

Every build includes:

• Complete disassembly and inspection

• New clutches/frictions and steels (build dependent)

• Complete overhaul kit (gaskets, seals, and o rings)

• New internal harness

• New internal and external spin on filters

• Converter upgraded per build level

Free Installation + Fluid

All transmission builds include:

• FREE installation

• FREE fluid

Build Options

Stock Rebuild (Stock Trucks Only)

A stock style rebuild intended for OEM power levels only.

• New frictions and steels

• Complete overhaul kit (gaskets, seals, o rings)

• New internal harness

• Internal and external spin on filters

• Stock torque converter

Fitment Requirements:

• Bone stock vehicles only

• No tuning exceptions

Note:
Any Allison behind a hotshot/heavy hauling truck will automatically have a billet input shaft added.

525 HP Build (Tune Only Tow/Daily)

Perfect for tuned trucks used for towing and daily driving.

• New clutches and steels

• Additional clutches in select packs (custom machined pressure plates)

• Increased line pressure

• Complete overhaul kit

• New internal harness

• Internal and external spin on filters

• Triple disc converter

Important Use Note:

• Best for daily/tow rigs

• No racing

• No competitive pulling

• No 4x4 boosted launches

Note:
Any Allison behind a hotshot/heavy hauling truck will automatically have a billet input shaft added.

750 HP Build (Street/Performance)

Built for higher horsepower trucks that need a stronger, more performance oriented Allison.

• New clutches and steels

• Extra clutches throughout the transmission (custom machined pressure plates)

• Complete overhaul kit

• TransGo + Ratiotek hydraulic upgrades

• New internal harness

• Internal and external spin on filters

• Triple disc converter

900 HP Build (High HP / Aggressive Use)

A serious build for high horsepower street trucks and aggressive driving.

• New clutches and steels

• Extra clutches throughout the transmission (custom machined pressure plates)

• Billet input shaft

• Billet output shaft

• Complete overhaul kit

• TransGo + Ratiotek hydraulic upgrades

• New internal harness

• Internal and external spin on filters

• Triple disc converter with extreme clutch upgrade

Competition Build (Race / Max Effort)

The ultimate Allison build for competition applications.

• New clutches and steels

• Extra clutches throughout the transmission (custom machined pressure plates)

• Billet input shaft

• Billet output shaft

• Billet P2 planet

• C2 hub with machined sun gear

• Complete overhaul kit

• TransGo + Ratiotek hydraulic upgrades

• New internal harness

• Internal and external spin on filters

• Triple disc converter with extreme clutch upgrade

Approval Required:
This build is approved case by case. Truck setup must be reviewed and approved before the build is confirmed.

Shipping / Core Charge (If Not Installed In Shop)

If you would like your transmission shipped:

• Add the $2,000 core charge

• Must be shipped to a commercial address with a forklift

• Additional shipping charges may apply if forklift access is not available

Powdercoat Option

Want it custom?

• Add $600 for powdercoat

• Any Prismatic Powders color of your choice

  Tuning Requirements (Warranty Policy)

  For warranty purposes, we must know what tuning company will be tuning your truck (ECM and TCM).

  If the tuning provider is not one we recommend or approve, we will require the truck to be tuned through our preferred options, and we will need to supply:

  • ECM tuning

  • TCM tuning

  This helps ensure the transmission is protected for long term reliability.