{"product_id":"dhd-dirty-alli-hi-performance-10l1000-stage-1-built-transmission-2020-gm-2500-3500hd","title":"DHD Dirty-Alli Hi-Performance 10L1000 Stage 1 Built Transmission | 2020+ GM 2500\/3500HD","description":"\u003cp\u003eThe DHD L5P Allison 10L1000 Built 10-Speed Stage 1 Transmission is engineered for 2020–2025 GM trucks equipped with the 6.6L Duramax L5P and Allison 10L1000 transmission. Designed for improved durability and performance, this upgraded transmission incorporates strengthened internal components and proprietary improvements to support diesel engines producing up to approximately 550 horsepower.\u003c\/p\u003e\n\u003cp\u003eEach DHD transmission is built using a rigorous assembly process performed in a controlled environment to ensure precision and reliability. Every component is hot tanked, ultrasonically cleaned, and carefully inspected before assembly. Critical measurements, functional checks, and piston apply tests are conducted during the build process to verify proper operation before the transmission leaves the bench.\u003c\/p\u003e\n\u003cp\u003eThe Stage 1 build includes increased clutch capacity, a DHD hard anodized F drum, proprietary valve body modifications, and multiple new OEM components. These upgrades help improve clutch holding ability and overall transmission reliability while maintaining smooth operation for street-driven performance trucks.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVehicle Fitment:\u003c\/strong\u003e 2020–2025 GM 6.6L Duramax L5P\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTransmission Model:\u003c\/strong\u003e Allison 10L1000 10-Speed Automatic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Rating:\u003c\/strong\u003e Up to approximately 550 horsepower\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncreased Clutch Capacity:\u003c\/strong\u003e Upgraded clutch packs for improved holding power\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDHD Hard Anodized F Drum:\u003c\/strong\u003e Strengthened internal component for added durability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew OEM Torque Converter:\u003c\/strong\u003e Included for reliable operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eValve Body Improvements:\u003c\/strong\u003e New valve body with proprietary DHD modifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNew Electronics and Wiring:\u003c\/strong\u003e Updated components for consistent performance\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSolenoid Stabilization and Testing:\u003c\/strong\u003e Verified for proper function\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDeep Transmission Pan:\u003c\/strong\u003e Helps increase fluid capacity and cooling efficiency\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNew OEM Gaskets, Seals, and Torrington Bearings\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cstrong\u003eNew OEM Sump Filter Included\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCore Requirement:\u003c\/strong\u003e A rebuildable transmission core and torque converter are required for this product. To receive full core credit, the returned core must be rebuildable with no case damage, catastrophic failure, or broken hard parts. The core must match the model and type of the transmission received. Electronic functionality is not required, and the core may show signs of normal wear.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Core charge and freight costs are additional. Transmission longevity depends on proper tuning, adequate cooling, and responsible driving habits. Excessive heat and repeated shock loads can reduce transmission life expectancy.\u003c\/p\u003e","brand":"Dirty Hooker Diesel","offers":[{"title":"Default Title","offer_id":51877400346907,"sku":"DH10L1-Z","price":7200.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/F144785134.jpg?v=1773251522","url":"https:\/\/wwmperformance.com\/products\/dhd-dirty-alli-hi-performance-10l1000-stage-1-built-transmission-2020-gm-2500-3500hd","provider":"WWM Performance","version":"1.0","type":"link"}