{"product_id":"umi-adjustable-rear-upper-control-arms-1977-1996-gm-b-body","title":"UMI Adjustable Rear Upper Control Arms for 1977-1996 GM B-Body","description":"\u003ch4\u003eAdjustable Rear Geometry for GM B-Body Performance\u003c\/h4\u003e\n\u003cp\u003eUMI 3624-R replaces the factory rear upper control arms on verified GM B-Body applications with an adjustable, extended-length design. The red powder-coated arms use greaseable Roto-Joints to reduce bind, support suspension articulation, and allow on-car pinion-angle adjustment for street, autocross, and track use.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUMI 3624-R is sold as a matched pair of adjustable rear upper control arms\u003c\/li\u003e\n\u003cli\u003eGreaseable Delrin-lined Roto-Joints provide 28 degrees of unrestricted movement\u003c\/li\u003e\n\u003cli\u003e4140 chromoly spherical balls and threaded adjusters support precise alignment\u003c\/li\u003e\n\u003cli\u003eQuarter-inch mild-steel mounting plates add strength at the chassis connection\u003c\/li\u003e\n\u003cli\u003eOn-car adjustment helps establish the required rear pinion angle\u003c\/li\u003e\n\u003cli\u003eRed powder-coated finish protects the mild-steel construction\u003c\/li\u003e\n\u003cli\u003eDirect bolt-on design uses the vehicle's original mounting hardware\u003c\/li\u003e\n\u003cli\u003eManufactured in the USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\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\u003cth\u003ePosition\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1991-1996\u003c\/td\u003e\n\u003ctd\u003eBuick\u003c\/td\u003e\n\u003ctd\u003eRoadmaster\u003c\/td\u003e\n\u003ctd\u003eRear upper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1978-1985\u003c\/td\u003e\n\u003ctd\u003eBuick\u003c\/td\u003e\n\u003ctd\u003eLeSabre\u003c\/td\u003e\n\u003ctd\u003eRear upper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1978-1996\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eCaprice\u003c\/td\u003e\n\u003ctd\u003eRear upper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1994-1996\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eImpala SS\u003c\/td\u003e\n\u003ctd\u003eRear upper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1977-1981\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eBonneville\u003c\/td\u003e\n\u003ctd\u003eRear upper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1977-1981\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eCatalina\u003c\/td\u003e\n\u003ctd\u003eRear upper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eManufacturer part number\u003c\/td\u003e\n\u003ctd\u003e3624-R\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct type\u003c\/td\u003e\n\u003ctd\u003eAdjustable extended-length rear upper control arms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJoint type\u003c\/td\u003e\n\u003ctd\u003eGreaseable Roto-Joint with Delrin race\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eJoint movement\u003c\/td\u003e\n\u003ctd\u003e28 degrees total\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBall and adjuster material\u003c\/td\u003e\n\u003ctd\u003e4140 chromoly steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMounting plate\u003c\/td\u003e\n\u003ctd\u003e0.250-inch mild steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eRed powder coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of manufacture\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003ePair of fully assembled UMI 3624-R rear upper control arms\u003c\/li\u003e\n\u003cli\u003eGreaseable Roto-Joints installed in both arms\u003c\/li\u003e\n\u003cli\u003eOriginal vehicle mounting hardware is reused and is not included\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAbout UMI Performance\u003c\/h4\u003e\n\u003cp\u003eUMI Performance designs and manufactures American-made suspension and chassis components for muscle cars and performance street vehicles. Its adjustable components are engineered to improve geometry, articulation, and repeatable setup.\u003c\/p\u003e\n\u003ch4\u003eRelated Parts\u003c\/h4\u003e\n\u003cul\u003e\u003cli\u003eNo exact compatible ACTIVE companion product was verified for this listing.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch4\u003eFAQ\u003c\/h4\u003e\n\u003cstrong\u003eWhat is the 3624-R?\u003c\/strong\u003e\n\u003cp\u003eIt is a red pair of adjustable, extended-length rear upper control arms for the verified GM B-Body applications listed above.\u003c\/p\u003e\n\u003cstrong\u003eWhat do the Roto-Joints change?\u003c\/strong\u003e\n\u003cp\u003eThey allow the rear suspension to articulate with less bind than a fixed rubber or polyurethane bushing while retaining a Delrin race for controlled street operation.\u003c\/p\u003e\n\u003cstrong\u003eCan pinion angle be adjusted with the arms installed?\u003c\/strong\u003e\n\u003cp\u003eYes. The threaded design allows on-car length adjustment so the rear pinion angle can be set for the vehicle's driveline configuration.\u003c\/p\u003e\n\u003cstrong\u003eHow much movement does each joint provide?\u003c\/strong\u003e\n\u003cp\u003eThe manufacturer specifies 28 degrees of total unrestricted movement.\u003c\/p\u003e\n\u003cstrong\u003eDoes this fit every GM rear-wheel-drive car?\u003c\/strong\u003e\n\u003cp\u003eNo. Fitment is limited to the years, makes, and models in the fitment table.\u003c\/p\u003e\n\u003cstrong\u003eIs mounting hardware included?\u003c\/strong\u003e\n\u003cp\u003eNo. The manufacturer specifies reuse of the original vehicle hardware.\u003c\/p\u003e\n\u003cstrong\u003eIs welding or drilling required?\u003c\/strong\u003e\n\u003cp\u003eNo. This is a direct bolt-on application for the verified vehicles and requires no chassis modification.\u003c\/p\u003e\n\u003cstrong\u003eWhat pinion angle should be used?\u003c\/strong\u003e\n\u003cp\u003eUMI recommends setting the angle for the vehicle and driveline combination; its installation guidance notes a typical street target of one to two degrees downward.\u003c\/p\u003e\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eConfirm the vehicle application, red finish, and 3624-R package label before disassembly.\u003c\/li\u003e\n\u003cli\u003eSupport the vehicle securely and keep the rear axle supported before removing either factory upper control arm.\u003c\/li\u003e\n\u003cli\u003eReplace one arm at a time, reusing serviceable original mounting hardware.\u003c\/li\u003e\n\u003cli\u003eAdjust both arms evenly to establish the required pinion angle without side-loading the axle.\u003c\/li\u003e\n\u003cli\u003eTorque all fasteners to the vehicle service-manual specifications at normal ride height.\u003c\/li\u003e\n\u003cli\u003eGrease the Roto-Joints, road-test the vehicle, and recheck fastener torque and pinion angle.\u003c\/li\u003e\n\u003c\/ol\u003e","brand":"UMI Performance","offers":[{"title":"Default Title","offer_id":67843304456271,"sku":"UMI3624-R","price":314.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/00034524a9098728d9a897c5e7e0e750.jpg?v=1792705932","url":"https:\/\/www.blackopsautoworks.com\/products\/umi-adjustable-rear-upper-control-arms-1977-1996-gm-b-body","provider":"Black Ops Auto Works","version":"1.0","type":"link"}