{"product_id":"2017-2019-gm-6-6l-duramax-l5p-tier-one-900hp-stage-2-allison-1000-transmission","title":"2017-2019 GM 6.6L Duramax L5P Tier One 900HP Stage 2 Allison 1000 Transmission","description":"\u003ch2\u003eTier One Stage 2 Allison 1000 Transmission for 2017-2019 GM 2500\/3500 6.6L L5P Duramax\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eTier One Stage 2 Allison 1000 Transmission\u003c\/strong\u003e is built to handle extreme power levels, heavy towing, off-roading, sled pulls, and racing. Designed for 2017-2019 GM 2500 \u0026amp; 3500 6.6L L5P Duramax trucks, this complete drop-in transmission supports up to 900 horsepower from aggressive Duramax tuning, bigger turbos, oversized injectors, and exhaust upgrades.\u003c\/p\u003e\n\u003ch3\u003eKey Features:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eBillet triple-disc torque converter\u003c\/li\u003e\n\u003cli\u003eBillet input shaft\u003c\/li\u003e\n\u003cli\u003eBillet C2 clutch hub\u003c\/li\u003e\n\u003cli\u003eHigh-pressure valve body with RatioTek kit\u003c\/li\u003e\n\u003cli\u003ePerformance overhaul kit with additional clutches (C1, C2, C3, C4)\u003c\/li\u003e\n\u003cli\u003eDeep transmission pan\u003c\/li\u003e\n\u003cli\u003eNew PCS solenoids and internal wiring harness\u003c\/li\u003e\n\u003cli\u003eNew switch manifold\u003c\/li\u003e\n\u003cli\u003eBillet PTO cover with C3 oiler notch\u003c\/li\u003e\n\u003cli\u003eNew transmission filter\u003c\/li\u003e\n\u003cli\u003eBlack powder-coated finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFixes common Allison transmission issues\u003c\/li\u003e\n\u003cli\u003eHandles extreme power and torque for sled pull, drag racing, off-road, and towing applications\u003c\/li\u003e\n\u003cli\u003eValve bodies are leak-checked and dyno-tested before installation\u003c\/li\u003e\n\u003cli\u003eShifts slightly firmer than stock for performance\u003c\/li\u003e\n\u003cli\u003e2-Year unlimited mileage warranty\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eVehicle Fitment: 2017-2019 GM Silverado or Sierra 2500\/3500 with 6.6L Duramax L5P\u003c\/li\u003e\n\u003cli\u003eTransmission Type: Allison 1000\u003c\/li\u003e\n\u003cli\u003ePower Rating: Up to 900 horsepower\u003c\/li\u003e\n\u003cli\u003eTorque Converter: Billet triple-disc\u003c\/li\u003e\n\u003cli\u003eInput Shaft: Billet Steel\u003c\/li\u003e\n\u003cli\u003eIntermediate \u0026amp; Output Shaft: OEM\u003c\/li\u003e\n\u003cli\u003eValve Body: High-pressure with RatioTek kit\u003c\/li\u003e\n\u003cli\u003eClutch Hub: Billet Steel\u003c\/li\u003e\n\u003cli\u003eClutches: SPZ\/Raybestos, increased C1-C4 count\u003c\/li\u003e\n\u003cli\u003eTransmission Pan: Deep with increased capacity\u003c\/li\u003e\n\u003cli\u003eGeartrain: OEM\/Machined P1 Sun Gear\u003c\/li\u003e\n\u003cli\u003ePTO Cover: Billet Aluminum with \"Tier One\" lettering \u0026amp; C3 oiler upgrade\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eAdditional Notes:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFor 2017-2019 GM Duramax L5P 2500 \u0026amp; 3500 only\u003c\/li\u003e\n\u003cli\u003eRequires a 300-mile break-in and a 100-mile transmission relearn\u003c\/li\u003e\n\u003cli\u003eFreight shipping required; inspect before signing Bill of Lading\u003c\/li\u003e\n\u003cli\u003e$2,500 core charge applies, refundable once stock transmission is returned and inspected\u003c\/li\u003e\n\u003cli\u003eRecommended gearing by tire size:\n\u003cul\u003e\n\u003cli\u003e35\": 3.73 or higher\u003c\/li\u003e\n\u003cli\u003e37\": 4.10 or higher\u003c\/li\u003e\n\u003cli\u003e38\"+: 4.56 or higher\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Tier One Transmissions","offers":[{"title":"2-Wheel\/Rear-Wheel Drive (2WD)","offer_id":51860058964251,"sku":"TODT1-A1-ST2-1719-X-2WD","price":9999.0,"currency_code":"USD","in_stock":true},{"title":"4-Wheel Drive (4WD)","offer_id":51860058997019,"sku":"TODT1-A1-ST2-1719-X-4WD","price":9999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0962\/5757\/3147\/files\/Screenshot2026-03-06at1.18.20PM.png?v=1772828329","url":"https:\/\/wwmperformance.com\/products\/2017-2019-gm-6-6l-duramax-l5p-tier-one-900hp-stage-2-allison-1000-transmission","provider":"WWM Performance","version":"1.0","type":"link"}