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Randy's Transmissions - Allison 1000 5-Speed Stage 2 (725HP) Transmission + Goerend Torque Converter (Requires billet FP insert)


2004.5 - 2005 Allison 1000 5-Speed Transmission for LLY 6.6L Duramax

Randy's Transmission Team


Randy's Transmissions are sent flat-rate freight. This freight cost covers freight to you and then back for the core return. Expedited shipping is not available for this item. Shipping address MUST be to an address with a loading dock or have a forklift. Please contact us first if other arrangements must be made.

Built to order: Typical build time of 5 days before shipping.

Warranty: Manufacturer 2-Year / Unlimited Mile. (Stage 1 & 2)

This item requires a Core Return or Core Charge

Please see link below for more information

Pricing: $6,995.00

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Flat-Rate Freight: $600.00


Randy's Transmissions - Allison 1000 5-Speed Stage 2 (725HP) Transmission + Goerend Torque Converter

Part # 311241031-LLY

Randy's Transmission has garnered a well earned reputation for building some of the best performance and competition use transmissions you can find, anywhere. Using quality components and know-how that can only come from years of running their own 2000+ HP truck, you can see why.

Allison 1000 Stage 2 725 Hp max

  • Raybestos C-3 C-4 Torque kit custom machined pressure plates
  • LML style pistons and return springs
  • Raybestos C-1, C-2 Torque kit
  • Ratio Tek pressure upgrades
  • Transgo trim valves
  • New torrington bearings
  • Goerend Torque converter with billet stator
  • New OE filters
  • Mag Hytec deep pan
  • Flexplate not included

NOTE: use of a billet flex plate is recommended for Stage 1 and necessary for Stage 2 and UP!

Warning: cores must be like-for-like - A 5-Speed core will not be accepted for a 6-Speed transmission or vice-versa.


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