{"product_id":"t400-atlas-adapter-4-25-as-6400","title":"TH400 to Atlas 4.25\" Adapter - AS-6400","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThe Advance Adapters TH400-Atlas Adapter (SKU AS-6400) is a 4.25\" spacer adapter built specifically for GM TH400 transmissions (also compatible with the 4L80E) that have a 4.5\" output shaft stickout. This is a fitment-specific measurement, so confirming your transmission's output shaft stickout length before ordering is worth doing — Advance Adapters calls out the 4.5\" figure specifically as the application this adapter is designed for.\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003e\u003cstrong\u003eWhat's included:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul dir=\"ltr\" class=\"[li_\u0026amp;]:mb-0 [li_\u0026amp;]:mt-1 [li_\u0026amp;]:gap-1 [\u0026amp;:not(:last-child)_ul]:pb-1 [\u0026amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\"\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eGM T400\/4L80E Gasket (716510)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eAdapter, TH400 to D300 (51-6400)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eH.H.C.S. 3\/8-16 x 1-1\/2\" Grade 5 Zinc (723723)\u003c\/li\u003e\n\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eLock Washer, 3\/8 Zinc (723704)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"\u003eThis is a lean kit — gasket, adapter, and hardware, nothing extra — built for a specific TH400\/4L80E-to-Atlas fitment where the 4.5\" output shaft stickout matches. Since the source listing is short on detail beyond the stickout spec and BOM, that's the extent of what I can verify; if you have Advance Adapters' fitment chart or install sheet, it'd be worth cross-referencing before publishing to confirm which specific Atlas or D300 applications this pairs with.\u003c\/p\u003e","brand":"Advance Adapters","offers":[{"title":"Default Title","offer_id":44666286145602,"sku":"AS-6400","price":279.13,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1476\/5984\/files\/0001628_t400-atlas-adapter-425_625.jpg?v=1785623274","url":"https:\/\/www.skinnypedalracing.com\/products\/t400-atlas-adapter-4-25-as-6400","provider":"Skinny Pedal Racing","version":"1.0","type":"link"}