{"product_id":"national-th400-turbo-400-3l80-rear-extension-seal","title":"National TH400 Turbo 400 3L80 Rear Extension Seal","description":"\u003cp\u003eQuality rear extension housing seal for the GM TH400 Turbo 400 3L80 heavy-duty automatic transmission. This National rear seal ensures leak-free sealing and proper fluid retention throughout the transmission. Essential for rebuilds, reseals, and routine maintenance of TH400 equipped vehicles from 1964 to 1990.\u003c\/p\u003e\u003cp\u003eDirect fitment for all TH400 3L80 applications in Chevrolet Corvette, Camaro SS, Chevelle SS, C10\/C20 trucks, GMC trucks, Pontiac GTO, Firebird, Buick, and Oldsmobile vehicles. National quality ensures dimensional accuracy and long-lasting sealing performance under all operating conditions.\u003c\/p\u003e","brand":"National","offers":[{"title":"Default Title","offer_id":50803772195063,"sku":null,"price":16.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6591\/1287\/files\/ph-gaskets-and-seals_ab779c52-2b35-497b-8044-a8914ad7012f.jpg?v=1780070960","url":"https:\/\/coretransmissionparts.com\/products\/national-th400-turbo-400-3l80-rear-extension-seal","provider":"CoreTransmissionParts.com","version":"1.0","type":"link"}