{"id":9970438996208,"title":"2004.5-2005 GM 6.6L Duramax Stage4 Transmission Upgrade Kit - GM Allison","handle":"2004-5-2005-gm-6-6l-duramax-stage4-transmission-upgrade-kit-gm-allison","description":"\u003cp\u003e\u003cimg title=\"50 State Legal\" src=\"https:\/\/www.ppediesel.com\/shop\/pub\/media\/wysiwyg\/50_States_Legal_LOGO.jpg\" alt=\"50 State Legal\" width=\"50\" height=\"53\"\u003e\u003cstrong\u003e50 States Emissions Legal (E.O. D-701-18)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"product attribute overview\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cp\u003ePPE’s Stage4 transmission kit is our entry-level kit that’s perfect for drag racing, sled pulling, towing or even daily driven use. This kit works extremely well for a stock truck but was engineered to handle a Duramax engine that has been equipped with multiple high performance modifications, such as performance chips, oversize injectors, and\/or small nitrous kits.\u003c\/p\u003e\n\u003cp\u003eThis kit includes PPE’s triple clutch converter, valve body recalibration kit (recalibration kit does not change shift points, only increases clutch holding power), converter flow valve and upgraded high-friction C1, C2, C3 and C4 clutches with Kolene steels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003cstrong data-mce-fragment=\"1\"\u003eNOTE: Torque Converter sold separately \u003c\/strong\u003e\u003c\/p\u003e","published_at":"2026-04-04T18:43:21-07:00","created_at":"2026-04-04T18:43:21-07:00","vendor":"Pacific Performance Engineering","type":"","tags":["2004-chevrolet-silverado-2500-hd-lly-8-cyl-6-6-liter-esr1301384","2004-chevrolet-silverado-2500hd-lly-8-cyl-6-6-liter-turbo-esr7824846","2004-gmc-sierra-2500hd-lly-8-cyl-6-6-liter-turbo-esr5894005","2004-gmc-sierra-3500hd-lly-8-cyl-6-6-liter-turbo-esr7076585","2005-chevrolet-silverado-2500hd-8-cyl-6-6-liter-turbo-esi8079105","2005-chevrolet-silverado-3500hd-8-cyl-6-6-liter-turbo-esi9612207","2005-gmc-sierra-2500hd-8-cyl-6-6-liter-turbo-esi9745976","2005-gmc-sierra-3500hd-8-cyl-6-6-liter-turbo-esi6494594","GM","Transmission Upgrades"],"price":129999,"price_min":129999,"price_max":129999,"available":true,"price_varies":false,"compare_at_price":0,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":49501533700336,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"128034202","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"2004.5-2005 GM 6.6L Duramax Stage4 Transmission Upgrade Kit - GM Allison","public_title":null,"options":["Default Title"],"price":129999,"weight":9072,"compare_at_price":0,"inventory_quantity":0,"inventory_management":null,"inventory_policy":"deny","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881615.jpg?v=1775353403","\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881731.jpg?v=1775353403","\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881890.jpg?v=1775353403","\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881960.jpg?v=1775353404","\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143882051.jpg?v=1775353403"],"featured_image":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881615.jpg?v=1775353403","options":["Title"],"media":[{"alt":null,"id":44161617658096,"position":1,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881615.jpg?v=1775353403"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881615.jpg?v=1775353403","width":1200},{"alt":null,"id":44161617690864,"position":2,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881731.jpg?v=1775353403"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881731.jpg?v=1775353403","width":1200},{"alt":null,"id":44161617723632,"position":3,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881890.jpg?v=1775353403"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881890.jpg?v=1775353403","width":1200},{"alt":null,"id":44161617756400,"position":4,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881960.jpg?v=1775353404"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143881960.jpg?v=1775353404","width":1200},{"alt":null,"id":44161617789168,"position":5,"preview_image":{"aspect_ratio":1.0,"height":1200,"width":1200,"src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143882051.jpg?v=1775353403"},"aspect_ratio":1.0,"height":1200,"media_type":"image","src":"\/\/www.hitechclassics.com\/cdn\/shop\/files\/2004.5-2005-GM-6.6L-Duramax-Stage4-Transmission-Upgrade-Kit-GM-Allison-Pacific-Performance-Engineering-143882051.jpg?v=1775353403","width":1200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003cp\u003e\u003cimg title=\"50 State Legal\" src=\"https:\/\/www.ppediesel.com\/shop\/pub\/media\/wysiwyg\/50_States_Legal_LOGO.jpg\" alt=\"50 State Legal\" width=\"50\" height=\"53\"\u003e\u003cstrong\u003e50 States Emissions Legal (E.O. D-701-18)\u003c\/strong\u003e\u003c\/p\u003e\n\u003cdiv class=\"product attribute overview\"\u003e\n\u003cdiv class=\"value\"\u003e\n\u003cp\u003ePPE’s Stage4 transmission kit is our entry-level kit that’s perfect for drag racing, sled pulling, towing or even daily driven use. This kit works extremely well for a stock truck but was engineered to handle a Duramax engine that has been equipped with multiple high performance modifications, such as performance chips, oversize injectors, and\/or small nitrous kits.\u003c\/p\u003e\n\u003cp\u003eThis kit includes PPE’s triple clutch converter, valve body recalibration kit (recalibration kit does not change shift points, only increases clutch holding power), converter flow valve and upgraded high-friction C1, C2, C3 and C4 clutches with Kolene steels.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cp\u003e \u003cstrong data-mce-fragment=\"1\"\u003eNOTE: Torque Converter sold separately \u003c\/strong\u003e\u003c\/p\u003e"}