{"product_id":"eaton-detroit-truetrac-differential-eat912a556-28-spline-rear-differential-for-8-5-inch-applications","title":"Eaton Detroit Truetrac Differential EAT912A556, 28-Spline Rear Differential for 8.5-Inch Applications","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; 28 Spline; 1.20 in. Axle Shaft Diameter; 2.73 And Up Ring Gear Pinion Ratio; Rear; 8.5 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\u003eThe Eaton Detroit Truetrac EAT912A556 is a helical-gear limited-slip differential designed to improve traction, acceleration, and handling in a wide range of rear-wheel-drive vehicles. Its automatic torque-biasing operation helps transfer power to the wheel with greater traction without requiring driver intervention, providing smooth performance in both forward and reverse.\u003c\/p\u003e\n\u003cp\u003eEngineered for rear 8.5-inch differential applications with 28-spline axle compatibility, the Detroit Truetrac is suitable for vehicles using a 2.73-and-up ring gear and pinion ratio. Its maintenance-free design does not require special lubrication or friction modifiers, helping simplify installation and long-term ownership. The durable gear-driven construction delivers quiet, predictable operation for street, performance, and general vehicle applications.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Eaton\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e EAT912A556\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Rear differential\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eDifferential Type:\u003c\/strong\u003e Helical-gear limited-slip differential\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAxle Compatibility:\u003c\/strong\u003e 28-spline axle shafts\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eAxle Shaft Diameter:\u003c\/strong\u003e 1.20 inches\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRing Gear Compatibility:\u003c\/strong\u003e 8.5-inch applications\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGear Ratio Compatibility:\u003c\/strong\u003e 2.73 and higher\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e One Eaton Detroit Truetrac limited-slip differential assembly. Confirm axle, spline, housing, and gear-ratio compatibility before installation. Vehicle-specific fitment information should be verified using the vehicle application and rear axle details.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eOptimized torque-bias ratios improve acceleration and handling by directing power toward the wheel with available traction.\u003c\/li\u003e\n\u003cli\u003eMaintenance-free design requires no special lubricant or friction modifiers when installed with the appropriate differential fluid.\u003c\/li\u003e\n\u003cli\u003eHelical-gear limited-slip operation provides smooth, automatic traction management without electronic controls.\u003c\/li\u003e\n\u003cli\u003eDurable construction delivers quiet, consistent performance in both forward and reverse operation.\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":67646950047996,"sku":"912A556","price":717.42,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0641\/6518\/3740\/files\/b99887b8556e01aff2bb11ec03f6c212_0033e6f6-9303-4e45-9aed-72999a427e5f.jpg?v=1791183357","url":"https:\/\/diycustoms.store\/products\/eaton-detroit-truetrac-differential-eat912a556-28-spline-rear-differential-for-8-5-inch-applications","provider":"diycustoms.store","version":"1.0","type":"link"}