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    LLY Duramax Transmission


    Manual Transmission
    Manual Transmission
    Full Transmission
    Full Transmission
    Transmission Pans
    Transmission Pans
    Flex Plates
    Flex Plates
    Controllers - Electronics
    Controllers - Electronics
    Allison Torque Converters
    Allison Torque Converters
    Transfer Case
    Transfer Case
    Transmission Components
    Transmission Components
    Transmission Cooling
    Transmission Cooling
    Transmission Filters
    Transmission Filters
    Maintain or upgrade the transmission system on your 2004.5–2005 LLY Duramax with premium parts engineered for reliability and performance. From Allison automatic transmissions to ZF6 manual transmission components, our selection includes clutches, torque converters, valve bodies, and rebuild kits designed to handle heavy towing and increased power. Trust high-quality transmission parts to ensure smooth shifting and long-lasting durability for your Duramax diesel.