{"product_id":"th375-400-bushing-extension-housing-longer","title":"Extension Housing Bushing (Longer) for GM TH375 TH400 Turbo 400 Transmission","description":"\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eExtension Housing Bushing (Longer) – Compatible with GM TH375 \u0026amp; TH400 Turbo 400 \/ 3L80 Transmissions\u003c\/strong\u003e\n\u003cstrong\u003eOEM Part Reference: #8619943\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWhat This Part Is:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThis is the longer-style extension housing bushing for GM TH375 and TH400 (Turbo 400 \/ 3L80) transmissions. It is a precision aftermarket replacement manufactured to OEM specifications, cross-referencing GM part number 8619943. This bushing is pressed into the rear of the transmission's extension (tail) housing and supports the slip yoke, which connects the transmission output shaft to the driveshaft.\u003c\/p\u003e\n\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eWhy You May Need This Part:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe extension housing bushing is a wear item that deteriorates over time, especially under the demands of high-mileage or high-performance use. Signs that this bushing needs replacement include:\u003c\/p\u003e\n\n\u003cul 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\"\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eNoticeable vibration while driving, especially at highway speeds\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eClunking or banging when transitioning between acceleration and deceleration\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eTransmission fluid leaking from the rear seal area\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eVisible lateral movement or slop in the driveshaft yoke when the driveshaft is removed\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003eScoring or uneven wear on one side of the slip yoke\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eReplacing this bushing restores proper yoke support, protects the rear output shaft seal, and eliminates drivetrain looseness.\u003c\/p\u003e\n\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eThe Longer Variant — Important Sizing Note:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eThe TH400 and TH375 use more than one extension housing bushing size. This listing is for the \u003cstrong\u003elonger\u003c\/strong\u003e version, designed for specific housing configurations. Before purchasing, please measure your existing bushing's outer diameter and length and compare to this part. If you are unsure which bushing you need, reach out — we're happy to help you confirm fitment.\u003c\/p\u003e\n\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eFitment Information:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003eCompatible with GM TH375 and TH400 (Turbo 400 \/ 3L80) transmissions, 1964 and up, installed in:\u003c\/p\u003e\n\n\u003cul 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\"\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eBuick\u003c\/strong\u003e – Full-size models, Riviera, LeSabre, Electra, and others with TH400\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eCadillac\u003c\/strong\u003e – DeVille, Fleetwood, Eldorado, and others with TH400\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eChevrolet\u003c\/strong\u003e – Camaro, Corvette, Chevelle, Impala, C\/K Trucks, and others with TH400 or TH375\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003eOldsmobile\u003c\/strong\u003e – Cutlass, 442, Delta 88, Toronado-based applications, and others\u003c\/li\u003e\n \t\u003cli class=\"font-claude-response-body whitespace-normal break-words pl-2\"\u003e\n\u003cstrong\u003ePontiac\u003c\/strong\u003e – Firebird, GTO, Bonneville, and others with TH400 or TH375\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cem\u003eThe TH375 was used from 1972–1976 in smaller displacement GM vehicles. It shares this bushing with the TH400 family.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003chr class=\"border-border-200 border-t-0.5 my-3 mx-1.5\"\u003e\n\u003cp class=\"font-claude-response-body break-words whitespace-normal\"\u003e\u003cstrong\u003eOEM \/ Cross Reference Numbers:\u003c\/strong\u003e\n8619943\u003c\/p\u003e","brand":"Trans Parts Direct","offers":[{"title":"Default Title","offer_id":52425217015989,"sku":"4008 OSM","price":21.84,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1006\/3872\/0181\/files\/4008-OSM-EDITED.jpg?v=1786616506","url":"https:\/\/transpartsdirect.com\/products\/th375-400-bushing-extension-housing-longer","provider":"Trans Parts Direct","version":"1.0","type":"link"}