{"product_id":"ford-f250-f350-super-duty-dana-50-60-front-axle-knuckle-tube-seal-kit-1998-2004","title":"Spicer Front Axle Vacuum Knuckle Seal \u0026 Outer Tube Dust Seal Overhaul Kit for 1998-2004 Ford Super Duty (Dana 50 \/ 60, Both Sides)","description":"\u003cp data-path-to-node=\"7\"\u003eRestore your truck's automatic four-wheel-drive engagement, eliminate catastrophic vacuum leaks, and safeguard your front wheel ends from destructive trail debris with this genuine \u003cb data-path-to-node=\"7\" data-index-in-node=\"181\"\u003eSpicer Front Axle Knuckle \u0026amp; Tube Seal Overhaul Kit\u003c\/b\u003e. Specifically packaged as a comprehensive, dual-side maintenance solution for \u003cb data-path-to-node=\"7\" data-index-in-node=\"310\"\u003e1998–2004 Ford F-250 and F-350 Super Duty\u003c\/b\u003e trucks and \u003cb data-path-to-node=\"7\" data-index-in-node=\"363\"\u003e2000–2005 Ford Excursion\u003c\/b\u003e models, this premium master package includes all the primary outer seals required to refresh both the driver and passenger sides of your front axle simultaneously.\u003c\/p\u003e\n\u003cp data-path-to-node=\"8\"\u003eOn solid-axle Ford 4x4 platforms, the Electronic Shift-on-the-Fly (ESOF) system relies on a strict vacuum environment inside the front steering knuckles to pull the automatic locking hubs into engagement. The massive primary knuckle seals are pressed directly onto the outer stub shafts and form the critical high-pressure boundary against the inner knuckle wall. Over decades of heavy use, extreme thermal cycles, or off-road mud exposure, these large rubber-and-steel seals naturally dry-rot, split, or score. When they fail, your hub vacuum drops to zero—leaving your dashboard 4WD selector switch completely useless. Accompanying these vacuum seals are the outer axle tube dust seals, which press into the ends of the housing tubes to block water, road salt, and grit from migrating down the tubes toward your inner differential seals.\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003eThis original equipment manufacturer (OEM) restoration package features premium-grade, multi-lip sealing elements built to survive immense rotational friction, severe steering angles, and harsh environmental grit. Sourcing a genuine Spicer master seal kit guarantees the exact factory press-fit outer diameters, structural reinforcement ribs, and compound durometers required to deliver an airtight seal and maintain long-lasting four-wheel-drive reliability.\u003c\/p\u003e\n\u003cp data-path-to-node=\"10\"\u003e\u003cb data-path-to-node=\"10\" data-index-in-node=\"0\"\u003eKit Contents (Services Both Left \u0026amp; Right Front Steering Knuckle Wheel Ends):\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"11\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,0,0\"\u003e(2) Premium Heavy-Duty Outer Axle Stub Shaft Vacuum Knuckle Seals (Part # 50491 \/ F81Z-3254-CB)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"11,1,0\"\u003e(2) Updated Multi-Lip Outer Axle Tube Dust Seals (Part # 50381 \/ F81Z-1S175-HCA)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"12\"\u003e\u003cb data-path-to-node=\"12\" data-index-in-node=\"0\"\u003eKit Highlights:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"13\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,0,0\"\u003e\u003cb data-path-to-node=\"13,0,0\" data-index-in-node=\"0\"\u003eComplete Dual-Side Master Pack:\u003c\/b\u003e Supplies exactly enough factory-correct vacuum seals and outer dust seals to overhaul both the driver and passenger side axle positions at the same time.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,1,0\"\u003e\u003cb data-path-to-node=\"13,1,0\" data-index-in-node=\"0\"\u003eRestores ESOF 4x4 Function:\u003c\/b\u003e Provides an absolute airtight vacuum barrier to stop vacuum drop-off, ensuring your automatic locking hubs engage instantly when you flip the switch.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,2,0\"\u003e\u003cb data-path-to-node=\"13,2,0\" data-index-in-node=\"0\"\u003eGenuine Spicer OEM Engineering:\u003c\/b\u003e Precision-molded by the vehicle's original axle supplier to guarantee strict dimensional alignment, matching factory blueprints, and uncompromised seal integrity.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"13,3,0\"\u003e\u003cb data-path-to-node=\"13,3,0\" data-index-in-node=\"0\"\u003eDual-Layer Contamination Defense:\u003c\/b\u003e Blocks intrusive mud, debris, highway salt, and water from fouling your inner spindle needle bearings or scoring your internal axle shafts.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-path-to-node=\"14\"\u003e\u003cb data-path-to-node=\"14\" data-index-in-node=\"0\"\u003eVehicle \u0026amp; Axle Fitment:\u003c\/b\u003e\u003c\/p\u003e\n\u003cul data-path-to-node=\"15\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,0,0\"\u003e\u003cb data-path-to-node=\"15,0,0\" data-index-in-node=\"0\"\u003eAxle Profiles:\u003c\/b\u003e Monobeam \/ Solid Front Axles: \u003cb data-path-to-node=\"15,0,0\" data-index-in-node=\"45\"\u003eDana 50 and Dana 60\u003c\/b\u003e configurations equipped with factory automatic vacuum-operated or manual locking hubs.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,1,0\"\u003e\u003cb data-path-to-node=\"15,1,0\" data-index-in-node=\"0\"\u003eFord Trucks:\u003c\/b\u003e 1998, 1999, 2000, 2001, 2002, 2003, and 2004 Ford F-250 Super Duty and F-350 Super Duty 4x4 models.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,2,0\"\u003e\u003cb data-path-to-node=\"15,2,0\" data-index-in-node=\"0\"\u003eFord Excursion:\u003c\/b\u003e 2000, 2001, 2002, 2003, 2004, and 2005 4x4 SUV configurations.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"15,3,0\"\u003e\u003cb data-path-to-node=\"15,3,0\" data-index-in-node=\"0\"\u003ePosition:\u003c\/b\u003e Front Outer Axle Wheel End — Left (Driver) and Right (Passenger) Sides (1 Kit Overhauls Entire Front Axle)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Spicer","offers":[{"title":"Default Title","offer_id":43562423615562,"sku":"PLAT-SPICER-KIT16","price":130.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0706\/5560\/6858\/files\/12_ecefff41-3b5f-4db3-8451-e450982ffbfb.jpg?v=1777722612","url":"https:\/\/platinumperformanceparts.com\/products\/ford-f250-f350-super-duty-dana-50-60-front-axle-knuckle-tube-seal-kit-1998-2004","provider":"Platinum Performance Parts","version":"1.0","type":"link"}