{"product_id":"usa-standard-axle-for-65-69-4wd-gm-truck","title":"Yukon ZA G3893605 1541H 30-Spline 6-Lug Rear Axle for 1965-1969 GM 4WD Truck","description":"\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e1965-1969 Chevrolet C10\/C15 and K10\/K15 4WD pickups, GM 12-bolt truck differential (semi-float rear)\u003c\/li\u003e \u003cli\u003e1965-1969 GMC C15\/C1500 and K15\/K1500 4WD pickups, GM 12-bolt truck differential (semi-float rear)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFitment Notes\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eFits the GM 12-bolt truck differential - a different, non-interchangeable axle from the GM 12-bolt passenger car differential used in cars of the same era\u003c\/li\u003e \u003cli\u003eThis is a 30-spline axle; stock 1965-1969 trucks originally used a 17-spline axle, so installing this axle also requires upgrading to a 30-spline carrier\u003c\/li\u003e \u003cli\u003e1963-1964 model year trucks use a different axle seal (2.535\" OD) than 1965-1969 trucks (2.579\" OD) - confirm the correct seal for your model year, and note 1963-1964 trucks also require the 30-spline carrier upgrade if converting from the stock 17-spline setup\u003c\/li\u003e \u003cli\u003eSold individually - order two for a complete rear axle set\u003c\/li\u003e \u003cli\u003eWheel studs, bearings, and seals are not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eFeatures\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eOne-piece forged 1541H alloy axle shaft, approximately 25% stronger than OE 1040\/1050 axles\u003c\/li\u003e \u003cli\u003eRolled splines for roughly 30% greater strength than cut splines\u003c\/li\u003e \u003cli\u003e30-spline, C-clip retained design\u003c\/li\u003e \u003cli\u003e6 x 5.50\" wheel stud pattern, press-in studs\u003c\/li\u003e \u003cli\u003eManufactured by USA Standard Gear\u003c\/li\u003e \u003cli\u003eBuilt for street, off-road, and heavier-duty use than factory axles\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eSpecifications\u003c\/h4\u003e\u003cul\u003e \u003cli\u003eDifferential: GM 12-bolt truck (semi-float, 4WD)\u003c\/li\u003e \u003cli\u003eAxle type: C-clip\u003c\/li\u003e \u003cli\u003eLength: 30.75\"\u003c\/li\u003e \u003cli\u003eSpline count: 30\u003c\/li\u003e \u003cli\u003eWheel stud pattern: 6 x 5.50\"\u003c\/li\u003e \u003cli\u003eMaterial: 1541H alloy steel\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eIncluded Components\u003c\/h4\u003e\u003cul\u003e \u003cli\u003e1x Axle shaft\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eProduct Description\u003c\/h4\u003e\u003cp\u003eThe Yukon ZA G3893605 is a direct-fit replacement 1541H alloy axle shaft for the 1965-1969 Chevrolet and GMC 4WD pickups equipped with the GM 12-bolt truck differential. Forged from 1541H alloy steel with rolled splines, it's built to be notably stronger than the original 1040\/1050 steel axles these trucks left the factory with, making it a common choice for owners upgrading a stock differential for street, tow, or off-road use.\u003c\/p\u003e\u003cp\u003eThis is a 30-spline axle, which is stronger than the 17-spline axle these trucks originally came with - but that strength upgrade only works if your differential carrier has also been converted to accept 30-spline axles. It's a common pairing with a carrier and gear upgrade rather than a standalone repair part. Seal specs also shift between 1963-1964 and 1965-1969 production, so confirming your exact model year is important before ordering the matching seal separately.\u003c\/p\u003e\u003cp\u003eThis axle is sold individually - a complete rear axle set requires two. It does not include wheel studs, bearings, or seals, so plan to order those separately if you're doing a full axle service. Installation involves removing the differential cover and carrier to access the axle, a job well within reach of an experienced DIY mechanic and a common step during a broader differential rebuild or upgrade.\u003c\/p\u003e\u003cmeta name=\"description\" content=\"Upgrade your 1965-1969 GM 4WD truck with Yukon's 30-spline rear axle, crafted from strong 1541H alloy for street and off-road durability.\"\u003e\u003cmeta name=\"keywords\" content=\"Yukon axle, 1541H alloy axle shaft, 1965-1969 Chevrolet C10, GM 12-bolt truck differential, 30-spline axle upgrade, 4WD axle for GMC, forged axle shaft for trucks, off-road axle for pickup, semi-float rear axle\"\u003e","brand":"Yukon Gear \u0026 Axle","offers":[{"title":"Default Title","offer_id":53864410349887,"sku":"YUKZA G3893605","price":172.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0832\/7308\/9343\/files\/22151654a131cb8a0d56bf7b96443277.jpg?v=1782577426","url":"https:\/\/wcaperformance.com\/products\/usa-standard-axle-for-65-69-4wd-gm-truck","provider":"WCA Performance","version":"1.0","type":"link"}