{"product_id":"eaton-detroit-truetrac-differential-eat913a555-30-spline-rear-8-875-inch-3-08-3-90-ratio","title":"Eaton Detroit Truetrac Differential EAT913A555, 30-Spline Rear 8.875-Inch, 3.08–3.90 Ratio","description":"The Detroit Truetrac is a helical-gear style, limited-slip differential that maximizes wheel traction and enhances driving characteristics. Maintenance-free, it features smooth, automatic operation in forward and reverse.  Its versatility makes Detroit Truetrac the ideal traction solution for almost any type of vehicle.\nDetroit Truetrac® Differential; 30 Spline; 1.29 in. Axle Shaft Diameter; 3.08 - 3.90 Ring Gear Pinion Ratio; Rear 8.875 in.;\n\u003cul\u003e\n  \u003cli\u003eOptimized Torque Bias Ratios Deliver Max Acceleration And Handling\u003c\/li\u003e\n  \u003cli\u003eNo Special Lubrication Or Friction Modifiers Needed\u003c\/li\u003e\n  \u003cli\u003eHelical Gear Limited Slip Differential\u003c\/li\u003e\n  \u003cli\u003eDurable; Smooth; Quiet Operation\u003c\/li\u003e\n  \u003cli\u003eWorks In Forward And Reverse\u003c\/li\u003e\n  \u003cli\u003eIdeal For Most Vehicles\u003c\/li\u003e\n  \u003cli\u003eAutomatic Engagement\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eBrief Description:\u003c\/strong\u003e The Eaton Detroit Truetrac EAT913A555 is a helical-gear limited-slip differential designed to improve traction, acceleration, and handling across a wide range of vehicles. Its automatic operation helps transfer torque to the wheel with greater traction without requiring driver input, providing smooth performance in both forward and reverse.\u003c\/p\u003e\u003cp\u003eBuilt for rear applications using an 8.875-inch ring gear and 30-spline axle configuration, this Detroit Truetrac differential is engineered for dependable performance and long service life. The maintenance-free design operates without special lubrication or friction modifiers, helping simplify installation and ongoing ownership. Its quiet, smooth operation makes it suitable for street-driven vehicles, performance applications, and other vehicles that require enhanced traction without the complexity of an actively controlled differential.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Product Specifications \u0026amp; Technical Data:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eBrand: Eaton\u003c\/li\u003e\n\u003cli\u003ePart Number: EAT913A555\u003c\/li\u003e\n\u003cli\u003eProduct Type: Detroit Truetrac helical-gear limited-slip differential\u003c\/li\u003e\n\u003cli\u003eApplication Position: Rear\u003c\/li\u003e\n\u003cli\u003eRing Gear Size: 8.875 inches\u003c\/li\u003e\n\u003cli\u003eAxle Spline Count: 30 spline\u003c\/li\u003e\n\u003cli\u003eAxle Shaft Diameter: 1.29 inches\u003c\/li\u003e\n\u003cli\u003eCompatible Ring Gear and Pinion Ratio: 3.08–3.90\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e One Eaton Detroit Truetrac differential assembly. Installation hardware, bearings, seals, and lubricant are not specified and should be confirmed before installation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e Designed for compatible rear differentials using an 8.875-inch ring gear, 30-spline axles, a 1.29-inch axle shaft diameter, and a 3.08–3.90 ring gear and pinion ratio. Verify vehicle-specific fitment, axle configuration, and manufacturer installation requirements before purchase.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOptimized torque bias ratios help improve acceleration and handling by directing torque toward the wheel with available traction.\u003c\/li\u003e\n\u003cli\u003eMaintenance-free operation does not require special lubrication or friction modifiers.\u003c\/li\u003e\n\u003cli\u003eHelical-gear limited-slip design provides automatic traction control without manual engagement.\u003c\/li\u003e\n\u003cli\u003eDurable construction delivers smooth, quiet operation in forward and reverse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cstyle\u003etable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; }\u003c\/style\u003e\n\u003ctable class=\"productattributes\"\u003e\n\u003cthead\u003e\u003ctr\u003e\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\u003ctd\u003eAir Freight Prohibited: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eNot Carb Approved: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eLtl Freight Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eProp 65: Unknown\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003ePart Type: automotive\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eEpa: N\/A\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eCarb Acknowledgement Required: false\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eRegular Stock: t\u003c\/td\u003e\u003c\/tr\u003e\n\u003ctr\u003e\u003ctd\u003eUnits Per Sku: 1\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cbr\u003e","brand":"Eaton","offers":[{"title":"Default Title","offer_id":67646951751932,"sku":"913A555","price":737.71,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/b99887b8556e01aff2bb11ec03f6c212_5fc104f7-6b38-4d34-879c-84ad1572da7a.jpg?v=1791183476","url":"https:\/\/diycustoms.store\/products\/eaton-detroit-truetrac-differential-eat913a555-30-spline-rear-8-875-inch-3-08-3-90-ratio","provider":"diycustoms.store","version":"1.0","type":"link"}