{"product_id":"strange-9-ford-strange-s-trac-helical-differential-217e1a5d5f","title":"Strange S-Trac Differential  Fits 9″ Ford With 35 Spline Axles  Requires Aftermarket 3.250″ Bore Case","description":"\u003ch5\u003eStrange Helical Differential For Ford 9in\u003c\/h5\u003e \u003cp\u003eThe Strange 35 Spline S-Trac Differential is a helical differential that offers smooth and progressive power transfer. Its superior design and quality make it ideal for the most abusive Street\/Track applications. The torque biasing S Trac Differential is purely mechanical which eliminates the need for clutches. It provides quiet operation while maximizing tire traction and vehicle acceleration.\u003c\/p\u003e \u003ch5\u003eThe Strange Helical Differential\u003c\/h5\u003e \u003cp\u003eBuilt with forged steel case halves that are heat treated and fully machined to minimize weight and provide a rigid mounting surface for the ring gear resulting in improved gear life. Internal gear pocket geometry is designed to minimize stress risers increasing component life. The housing encapsulates precision manufactured gears, including 9310 steel pinion gears, that provide exceptional strength. All internal gears, pinion and side gears, are vacuum heat treated to increase strength and also cold treated to extend service life while reducing wear. A dry film solid lubricant coating is applied to friction surfaces to minimize wear.\u003c\/p\u003e \u003ch5\u003eIdeal for road racing, off-road and autocross applications.\u003c\/h5\u003e \u003cp\u003eThe S Trac Helical Differential is recommended for full bodied street\/track cars that run the 1\/4 mile in the low 9 seconds or slower. For Drag Race Only vehicles, Strange Engineering recommends using a \u003ca href=\"https:\/\/www.strangeengineering.net\/product-category\/drag-racing-differentials-spools\/\"\u003espool\u003c\/a\u003e. The seamless operation also makes it ideal for road racing, off-road and autocross. This premium differential unit carries a limited lifetime replacement warranty to the original purchaser.\u003c\/p\u003e\n\u003cp\u003e\u003cb\u003eApplication\u003c\/b\u003e – Ford 9″ with 35 spline axles\u003c\/p\u003e \u003cp\u003e\u003cb\u003eRequirements\u003c\/b\u003e\u003cbr\u003e Aftermarket 3.250″ bore case\u003cbr\u003e Axles with 30 degree pressure angle\u003c\/p\u003e \u003cp\u003e\u003cb\u003eDescription\u003c\/b\u003e\u003cbr\u003e Strange 35 Spline S-Trac\u003cbr\u003e This helical gear differential offers smooth and progressive power transfer\u003cbr\u003e Superior design and quality make it ideal for the most abusive Street\/Track applications\u003c\/p\u003e \u003cp\u003e\u003cb\u003eFeatures\u003c\/b\u003e\u003cbr\u003e \u003cb\u003eTorque Biased, Mechanical \u0026amp; Clutchless\u003c\/b\u003e\u003cbr\u003e • Maximizes traction and acceleration\u003cbr\u003e • Dependable and maintenance free\u003cbr\u003e • Quiet operation\u003c\/p\u003e \u003cp\u003e\u003cb\u003eForged Steel Case Halves\u003c\/b\u003e\u003cbr\u003e • Heat treated\u003cbr\u003e • Fully machined\u003cbr\u003e • Provides a light, durable, and rigid unit\u003c\/p\u003e \u003cp\u003e\u003cb\u003eInternal Gear Pocket Geometry\u003c\/b\u003e\u003cbr\u003e • Minimizes stress risers\u003cbr\u003e • Increases service life\u003c\/p\u003e \u003cp\u003e\u003cb\u003eDry Film Solid Lubricant Coating\u003c\/b\u003e\u003cbr\u003e • Applied to thrust surfaces\u003cbr\u003e • Minimizes component wear\u003c\/p\u003e \u003cp\u003e\u003cb\u003e9310 Steel Pinion Gears\u003c\/b\u003e\u003cbr\u003e • Chrome moly material\u003cbr\u003e • Provides the ultimate in torque carrying capacity\u003c\/p\u003e \u003cp\u003e\u003cb\u003eAggressive Gear Helix Angle\u003c\/b\u003e\u003cbr\u003e • Promotes superior torque bias\u003cbr\u003e • Excels in situations of unequal traction\u003c\/p\u003e \u003cp\u003e\u003cb\u003eAll Internal Gears Made from 9310 Steel\u003c\/b\u003e\u003cbr\u003e • Vacuum heat treated for superior strength\u003cbr\u003e • Additionally cold treated to optimize fatigue life and reduce wear\u003c\/p\u003e \u003cp\u003e\u003cb\u003eProven Quality\u003c\/b\u003e\u003cbr\u003e • Designed, machined, \u0026amp; assembled by Strange\u003cbr\u003e • Materials made in the USA\u003c\/p\u003e \u003cp\u003e\u003cb\u003eGear Lube\u003c\/b\u003e\u003cbr\u003e DO NOT USE SYNTHETIC GEAR OIL\u003cbr\u003e Will adversely affect unit operation and void warranty\u003c\/p\u003e \u003cp\u003eUse Only Petroleum Based 85W-140 Gear Oil\u003c\/p\u003e \u003cp\u003e\u003cb\u003eRelated Components\u003c\/b\u003e\u003cbr\u003e S-Series 3.250″ bore case…………. N2206\u003cbr\u003e Pro Iron 3.250″ bore case…………. N1906\u003cbr\u003e Pro HD Alum 3.250″ case kit……… P3203\u003c\/p\u003e \u003cp\u003eSide bearings \u0026amp; races……………….. D1590\u003c\/p\u003e \u003cp\u003eAlloy axle package………………. P3502 \/ P3504\u003c\/p\u003e","brand":"Strange Engineering","offers":[{"title":"Default Title","offer_id":67678845796652,"sku":"N1980","price":1095.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0698\/6429\/2652\/files\/N1980-1.jpg?v=1793044761","url":"https:\/\/www.lee-motorsports.com\/products\/strange-9-ford-strange-s-trac-helical-differential-217e1a5d5f","provider":"Lee Motorsports","version":"1.0","type":"link"}