{"product_id":"heavy-duty-speedometer-block-off-plug-kit-for-th35","title":"Heavy Duty Speedometer Block Off Plug Kit For TH350 TH400 Transmission Fits 1968 To 1981 Chevrolet GMC Buick Classic Muscle Car Turnkey Swap Seal Set","description":"\u003cdiv\u003e\n\u003cp\u003eSingle Aluminum Speedometer Block Off Plug Kit For Auto Drives\u003cbr\u003e✔️ CNC aluminum seal plug With ring Fits 22.6mm and 0.89 inch mounts\u003c\/p\u003e \u003cp\u003eThis single piece block off plug kit seals your tail housing when you swap to a digital speedometer sensor. You slide it straight into the factory opening of your classic GM or Buick drive train without drilling or cutting sheet metal. The upgraded silicone O ring locks out dirt moisture and keeps pricey transmission fluid inside the casing.\u003c\/p\u003e ✅ Compatible with TH350 and TH350C Turbo Hydra Matic tail units\n✅ Replaces part numbers like 25513247 and A44774 for exact fitment\n✅ CNC turned from T6061 aircraft grade aluminum alloy body\n✅ Stops slippery fluid seepage around the 17 to 22 tooth gear cluster\n✅ Snaps onto the housing in minutes with basic socket wrench\n✅ Blocks legacy analog ports cleanly in durable silver color \u003cp\u003e💡 What causes mechanical speedometer drive failures in classic automatic trucks?\n- Factory plastic gears crack under heat stress or strip their internal spline housing\n- Swapping to this handy aluminum block seal stops internal oil creep around the rotating shaft\n- You secure a flat mounting face for digital pickoff sensors without messy fabricating work\n- Hardened billet metal fights road salt and engine bay temps so your readout stays dead accurate\u003c\/p\u003e✝️\u003c\/div\u003e","brand":"Amazon","offers":[{"title":"Default Title","offer_id":68225879736555,"sku":"VXB0FS28LX2K","price":49.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/3268\/0683\/files\/61JEN_15ztL.jpg?v=1792635470","url":"https:\/\/vxbom.com\/products\/heavy-duty-speedometer-block-off-plug-kit-for-th35","provider":"VXB Bearings","version":"1.0","type":"link"}