{"product_id":"penngrade-1-limited-slip-gear-oil-gl-5-80w-90-1-qt-lsd-posi-27-7732-6","title":"PennGrade 1 Limited-Slip Gear Oil | LSD \/ Posi Differential | GL-5 80W-90 (27-7732-6)","description":"\u003ch2\u003e\u003cb\u003ePennGrade 1 Limited-Slip Gear Oil — GL-5, 80W-90 (1 qt)\u003c\/b\u003e\u003c\/h2\u003e\u003cp\u003eA conventional gear oil with a \u003cb\u003elimited-slip (LSD\/Posi)\u003c\/b\u003e additive package for differentials requiring \u003cb\u003eAPI GL-5\u003c\/b\u003e specification with limited-slip friction modifiers.\u003c\/p\u003e\u003ch3\u003e\u003cb\u003eVehicle Fitment\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eLimited-slip differentials:\u003c\/b\u003e LSD and Posi-traction units requiring GL-5 spec\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHypoid differentials:\u003c\/b\u003e with clutch-pack or cone-type LSD units\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eNot for VW air-cooled transaxles:\u003c\/b\u003e VW boxes are GL-4 — use part 27-7729-6 instead\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cb\u003eWhy Choose PennGrade 1?\u003c\/b\u003e\u003c\/h3\u003e\u003cp\u003ePennGrade 1 is the modern brand name for the legendary \"Brad Penn\" green oil — refined in Pennsylvania from paraffinic crude, long a favorite of vintage and air-cooled engine builders. Made in the USA.\u003c\/p\u003e\u003ch3\u003e\u003cb\u003eKey Features \u0026amp; Benefits\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eLimited-slip additive package:\u003c\/b\u003e friction modifiers formulated for LSD\/Posi clutch-pack and cone-type units.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGL-5 extreme-pressure protection:\u003c\/b\u003e for hypoid differentials under heavy load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e80W-90 grade:\u003c\/b\u003e conventional gear oil viscosity.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cb\u003eTechnical Specifications\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eEMPI Part #:\u003c\/b\u003e 27-7732-6\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eGrade:\u003c\/b\u003e 80W-90\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAPI:\u003c\/b\u003e GL-5 with LSD additives\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eVolume:\u003c\/b\u003e 1 quart bottle, sold individually (case of 12)\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eUPC:\u003c\/b\u003e 707924570397\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eCountry of Origin:\u003c\/b\u003e USA\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003e\u003cb\u003eFrequently Asked Questions\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eCan I use this in my VW air-cooled transaxle?\u003c\/b\u003e No. The VW transaxle is a GL-4 application — GL-5 additives can attack the brass synchros. Use PennGrade 1 GL-4 80W-90 (part 27-7729-6) in a VW box instead.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eWhat is the limited-slip additive for?\u003c\/b\u003e It provides friction modifiers required by limited-slip (LSD\/Posi) clutch-pack and cone-type differential units to operate correctly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003ch3\u003e\u003cb\u003eExplore Related Categories\u003c\/b\u003e\u003c\/h3\u003e\u003cp\u003e\u003ca href=\"\/collections\/oils\"\u003eOils \u0026amp; Lubricants\u003c\/a\u003e · \u003ca href=\"\/collections\/drivetrain-transmission\"\u003eDrivetrain \u0026amp; Transmission\u003c\/a\u003e · \u003ca href=\"\/collections\/axles\"\u003eAxles\u003c\/a\u003e\u003c\/p\u003e","brand":"PennGrade 1","offers":[{"title":"Default Title","offer_id":45031565426803,"sku":"27-7732-6","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/PG1_Ltd-Slp-GL-5-GO-80W90_Qt.jpg?v=1779613496","url":"https:\/\/www.washburnsmetal.com\/products\/penngrade-1-limited-slip-gear-oil-gl-5-80w-90-1-qt-lsd-posi-27-7732-6","provider":"Washburn's Metal","version":"1.0","type":"link"}