{"product_id":"yukon-zg-gm12p-390-ring-pinion-gm-12-bolt-car-3-90-ratio","title":"Yukon Gear \u0026 Axle USA Standard Ring \u0026 Pinion Gear Set For GM 12 Bolt Car in a 3.90 Ratio","description":"\u003cp\u003eYukon Gear \u0026amp; Axle USA Standard Ring \u0026amp; Pinion Gear Set For GM 12 Bolt Car in a 3.90 Ratio is the exact Yukon Gear \u0026amp; Axle final drive gears identified by manufacturer part number ZG GM12P-390. Match the part number, vehicle, axle housing, differential, spline count, gear ratio, carrier break, position, dimensions, and intended use before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExceeds OEM specifications — rigorous in-house dimensional, material, and fitment testing\u003c\/li\u003e\n\u003cli\u003e3.90 gear ratio — a performance-oriented ratio suited for strip and street performance builds\u003c\/li\u003e\n\u003cli\u003eFits GM 12-bolt car differential — 1964-1972 GM A-body and F-body muscle car applications\u003c\/li\u003e\n\u003cli\u003eYukon Lifetime Warranty — Magnuson-Moss protections apply for drivetrain warranty claims\u003c\/li\u003e\n\u003cli\u003e1x Yukon ZG GM12P-390 ring gear\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFitment\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eVerified catalog applications: 1964-1968 Chevrolet Chevy II, 1964-1970 Buick Wildcat, 1964-1972 Chevrolet Bel Air, 1964-1972 Chevrolet Biscayne, 1964-1972 Chevrolet Chevelle, 1964-1972 Chevrolet Impala, 1965-1972 Chevrolet El Camino, 1966-1970 Chevrolet Caprice, 1967-1972 Chevrolet Camaro, 1969-1972 Chevrolet Nova, 1969-1972 Pontiac Firebird, 1970-1972 Chevrolet Monte Carlo, 1970-1972 Pontiac GTO. Confirm axle housing, differential, spline count, gear ratio, carrier break, position, and manufacturer exclusions for the exact vehicle before ordering.\u003c\/p\u003e\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1964-1968\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eChevy II\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1964-1970\u003c\/td\u003e\n\u003ctd\u003eBuick\u003c\/td\u003e\n\u003ctd\u003eWildcat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1964-1972\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eBel Air\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1964-1972\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eBiscayne\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1964-1972\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eChevelle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1964-1972\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eImpala\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1965-1972\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eEl Camino\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1966-1970\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1967-1972\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCamaro\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1969-1972\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eNova\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1969-1972\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eFirebird\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1970-1972\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eMonte Carlo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1970-1972\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eGTO\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eSpecifications\u003c\/strong\u003e\u003c\/p\u003e\u003ctable\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eYukon Gear \u0026amp; Axle\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufacturer Part Number\u003c\/th\u003e\n\u003ctd\u003eZG GM12P-390\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSKU\u003c\/th\u003e\n\u003ctd\u003eYUKZG GM12P-390\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUPC\u003c\/th\u003e\n\u003ctd\u003e883584361695\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eFinal Drive Gears\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFitment Type\u003c\/th\u003e\n\u003ctd\u003eVehicle Specific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCatalog Status\u003c\/th\u003e\n\u003ctd\u003eManufacturer Verification Required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCondition\u003c\/th\u003e\n\u003ctd\u003eNew\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eOne new Yukon Gear \u0026amp; Axle final drive gears identified by manufacturer part number ZG GM12P-390, plus only the bearings, seals, shims, fasteners, and hardware expressly supplied for this exact part number.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAbout Yukon Gear \u0026amp; Axle\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eYukon Gear \u0026amp; Axle develops ring and pinion sets, axles, differentials, bearings, seals, installation kits, and drivetrain service components for street, towing, off-road, and performance applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRelated Yukon Gear \u0026amp; Axle Products\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/collections\/yukon-gear-axle\"\u003eShop all Yukon Gear \u0026amp; Axle products\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/products\/usa-standard-dana-44-ring-pinion-gear-set-replacement\"\u003eYukon Gear \u0026amp; Axle USA Standard Dana 44 Ring \u0026amp; Pinion Gear Set Replacement\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/products\/usa-standard-ring-pinion-dana-44-5-38-ratio\"\u003eYukon Gear \u0026amp; Axle USA Standard Replacement Ring \u0026amp; Pinion Gear Set For Dana 44 in a 5.38 Ratio\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-ca\/products\/usa-standard-replacement-ring-pinion-gear-set-for-dana-80-in-a-4-30-ratio\"\u003eYukon Gear \u0026amp; Axle USA Standard Replacement Ring \u0026amp; Pinion Gear Set For Dana 80 in a 4.30 Ratio\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequently Asked Questions\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill Yukon Gear \u0026amp; Axle ZG GM12P-390 fit my vehicle?\u003c\/strong\u003e\u003cbr\u003eVerified catalog applications: 1964-1968 Chevrolet Chevy II, 1964-1970 Buick Wildcat, 1964-1972 Chevrolet Bel Air, 1964-1972 Chevrolet Biscayne, 1964-1972 Chevrolet Chevelle, 1964-1972 Chevrolet Impala, 1965-1972 Chevrolet El Camino, 1966-1970 Chevrolet Caprice, 1967-1972 Chevrolet Camaro, 1969-1972 Chevrolet Nova, 1969-1972 Pontiac Firebird, 1970-1972 Chevrolet Monte Carlo, 1970-1972 Pontiac GTO. Confirm axle housing, differential, spline count, gear ratio, carrier break, position, and manufacturer exclusions for the exact vehicle before ordering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat should I verify before ordering?\u003c\/strong\u003e\u003cbr\u003eVerify the exact part number, vehicle, axle housing, differential, spline count, gear ratio, carrier break, bearing dimensions, position, intended use, and manufacturer exclusions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included?\u003c\/strong\u003e\u003cbr\u003eThe package contains only the Yukon Gear \u0026amp; Axle components and hardware specified for part number ZG GM12P-390. Related bearings, seals, fluids, tools, and service parts are sold separately unless expressly listed.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eFollow Yukon Gear \u0026amp; Axle's current instructions for part number ZG GM12P-390. Confirm all measurements and clearances, inspect mating components, set bearing preload and gear backlash where applicable, verify contact pattern, use specified lubricants and torque values, and have precision differential work completed by a qualified drivetrain technician.\u003c\/p\u003e","brand":"Yukon Gear \u0026 Axle","offers":[{"title":"Default Title","offer_id":45974398107727,"sku":"YUKZG GM12P-390","price":359.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/yukon-gear-axle-yukzg-gm12p-390-product-image-01-1590887503.jpg?v=1790716796","url":"https:\/\/www.blackopsautoworks.com\/en-ca\/products\/yukon-zg-gm12p-390-ring-pinion-gm-12-bolt-car-3-90-ratio","provider":"Black Ops Auto Works","version":"1.0","type":"link"}