{"product_id":"penngrade-1-multi-purpose-gear-oil-gl-4-80w-90-1-qt-vw-transaxle-27-7729-6","title":"PennGrade 1 Gear Oil | VW Air-Cooled Transaxle | GL-4 80W-90 (27-7729-6)","description":"\u003ch2\u003e\u003cb\u003ePennGrade 1 Multi-Purpose Gear Oil — GL-4, 80W-90 (1 qt)\u003c\/b\u003e\u003c\/h2\u003e\u003cp\u003eA high-quality conventional gear oil for manual transmissions and transaxles that specifically require \u003cb\u003eAPI GL-4\u003c\/b\u003e (not GL-5). The VW air-cooled transaxle is a GL-4 application — using GL-5 in it can attack the brass synchros over time.\u003c\/p\u003e\u003ch3\u003e\u003cb\u003eVehicle Fitment\u003c\/b\u003e\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eVW Air-Cooled Transaxle:\u003c\/b\u003e Type 1, Type 2, Type 3, Type 4 manual transmissions — the correct gear oil for your VW box\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eAny manual transmission:\u003c\/b\u003e requiring API GL-4 specification\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\u003eCorrect GL-4 spec:\u003c\/b\u003e safe for the brass synchronizer rings used in the VW transaxle.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003e80W-90 grade:\u003c\/b\u003e conventional multi-purpose gear oil for manual gearboxes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eTransaxle capacity:\u003c\/b\u003e approximately 2.5 quarts for a Type 1 transaxle, ~3 quarts for Type 2\/Type 4.\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 27-7729-6\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-4\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 707924570403\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\u003eWhy GL-4 and not GL-5 in a VW transaxle?\u003c\/b\u003e GL-5 gear oils contain higher levels of sulfur-phosphorus extreme-pressure additives needed for hypoid differentials, but those additives corrode brass synchronizer rings in manual gearboxes over time. The VW transaxle uses brass synchros, so use GL-4 (this product), not GL-5.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eHow much do I need for a VW transaxle?\u003c\/b\u003e Approximately 2.5 quarts for a Type 1 transaxle and about 3 quarts for Type 2\/Type 4.\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\/transaxle-components\"\u003eTransaxle Components\u003c\/a\u003e · \u003ca href=\"\/collections\/drivetrain-transmission\"\u003eDrivetrain \u0026amp; Transmission\u003c\/a\u003e\u003c\/p\u003e","brand":"PennGrade 1","offers":[{"title":"Default Title","offer_id":45031565328499,"sku":"27-7729-6","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0278\/2760\/1523\/files\/PG1_-MP-GL-4-GO-80W90_Qt.jpg?v=1779613475","url":"https:\/\/www.washburnsmetal.com\/products\/penngrade-1-multi-purpose-gear-oil-gl-4-80w-90-1-qt-vw-transaxle-27-7729-6","provider":"Washburn's Metal","version":"1.0","type":"link"}