{"id":1511,"date":"2025-06-04T10:41:05","date_gmt":"2025-06-04T02:41:05","guid":{"rendered":"https:\/\/hengoseal.com\/?p=1511"},"modified":"2025-06-04T10:41:05","modified_gmt":"2025-06-04T02:41:05","slug":"differential-pinion-seal-guide","status":"publish","type":"post","link":"https:\/\/hengoseal.com\/ml\/differential-pinion-seal-guide\/","title":{"rendered":"Differential Pinion Seal: Functions, Failure Signs & How to Replace It?"},"content":{"rendered":"
Got a mysterious oil stain under your car? It might be a failing differential pinion seal \u2014 and ignoring it could cost you a gearbox.<\/p>\n
A differential pinion seal prevents fluid from leaking out where the driveshaft connects to the differential. When it fails, you’ll notice leaks, whining noises, or worse \u2014 drivetrain failure.<\/p>\n
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If you\u2019ve ever spotted gear oil near your rear axle or noticed a faint burning smell during long drives, the pinion seal may be the culprit. Let\u2019s break down everything you need to know \u2014 from symptoms to step-by-step replacement and smart sourcing tips.<\/p>\n
Think your drivetrain is sealed tight? Not if your pinion seal fails \u2014 this small but mighty part protects your gears and extends the life of your axle.<\/p>\n
The pinion seal keeps differential fluid inside while allowing the driveshaft to rotate freely. Without it, gear oil leaks out, and internal components wear down fast.<\/p>\n
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Here\u2019s a breakdown of how it works:<\/p>\n