{"product_id":"gm-8-5-re-gear-kit-3-90-ratio","title":"GM 8.5\" Re-Gear Kit 3.90 Ratio","description":"The Zumbrota Drivetrain Yukon Muscle Car Re-Gear Kit provides an aggressive gear ratio upgrade to enhance a vehicle's launching capability and acceleration. This kit is specifically designed for GM 8.5-inch differentials and includes the ring and pinion gear set, along with all required bearings and installation hardware.\n\nKey specifications for this re-gear kit include a 30-spline pinion gear, a 3.90 gear ratio, and a 10-bolt ring gear. The kit also comes with 2.25-inch OD bearings, ensuring comprehensive coverage for the differential upgrade. This product is intended for muscle car applications and hot-rodded vehicles utilizing the GM 8.5” differential.\n\nFitment details provided indicate compatibility with specific models such as the 1970-1981 Firebird Trans Am and 1970-1977 GTO, as well as approximately 25 other models that use the GM 8.5” differential. It is suitable for any vehicle hot-rodded with this specific differential configuration.","brand":"Zumbrota Drivetrain","offers":[{"title":"Default Title","offer_id":52871749468472,"sku":"YGK2332","price":708.89,"currency_code":"USD","in_stock":true}],"url":"https:\/\/store.motormia.co\/products\/gm-8-5-re-gear-kit-3-90-ratio","provider":"MOTORMIA","version":"1.0","type":"link"}