{"product_id":"dorman-946-621-drive-shaft-rear","title":"Dorman 946-621 Drive Shaft - Rear","description":"\u003ch2\u003eDorman 946-621 Rear Drive Shaft Assembly\u003c\/h2\u003e\u003cp\u003eDorman 946-621 is a complete rear drive shaft assembly built for direct replacement service. It arrives pre-balanced and uses 100% new yokes, tubes, CV joints, and universal joints to simplify driveline repair on applications such as Ford F-250 and Ford F-350 trucks.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eComplete rear driveshaft assembly for driveline replacement\u003c\/li\u003e\n\u003cli\u003ePre-balanced for installation-ready service\u003c\/li\u003e\n\u003cli\u003e100% new yokes, tubes, constant velocity joints, and universal joints\u003c\/li\u003e\n\u003cli\u003eSteel shaft construction with a 3.5 in diameter\u003c\/li\u003e\n\u003cli\u003e134.02 in overall length with 0.083 in wall thickness\u003c\/li\u003e\n\u003cli\u003eGreaseable design for service access\u003c\/li\u003e\n\u003cli\u003eOverall length adjustable for application-specific fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Dorman drive shaft is engineered as a direct replacement for rear driveline service where the original shaft is worn, damaged, or out of balance. The steel construction, greaseable joints, and adjustable overall length support a precise replacement on Ford F-250 and Ford F-350 driveline applications. Part number 946-621 is supplied as a complete assembly to reduce the need for rebuilding individual shaft components.\u003c\/p\u003e\u003cp\u003eThis part cross-references Ford OE number F81A4K357AA for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Helps Fix\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eVibration caused by a bent or out-of-balance driveshaft\u003c\/li\u003e\n\u003cli\u003eClunking or driveline noise from worn U-joints or CV joints\u003c\/li\u003e\n\u003cli\u003eLoss of driveline smoothness under load\u003c\/li\u003e\n\u003cli\u003eDamage from corrosion, impact, or shaft tube wear\u003c\/li\u003e\n\u003cli\u003eService issues related to a non-greaseable or worn rear shaft assembly\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify shaft length, flange style, and driveline configuration before installation. Because this assembly is adjustable in overall length, confirm the final measurement against the removed shaft and vehicle specifications. Inspect companion flanges, seals, and mounting points during replacement to help prevent repeat driveline noise. Part number 946-621 is intended for rear driveshaft service on the listed Ford truck applications.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman supplies this assembly as a pre-balanced replacement with all-new shaft components for consistent driveline service. The design focuses on restoring proper fit and function in Ford F-250 and Ford F-350 rear driveshaft applications.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52798261887157,"sku":"BKKY-946-621","price":1454.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RB_946621_Generic.jpg?v=1784008911","url":"https:\/\/www.partcatalog.com\/products\/dorman-946-621-drive-shaft-rear","provider":"PartCatalog","version":"1.0","type":"link"}