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Your vehicle's differential cover gasket, also called a differential gasket, seals gear oil inside the differential to lubricate the ring and pinion gears. By sealing fluid inside the differential, the differential cover gasket is essential to proper gear operation and friction reduction to prevent component damage. The differential gasket seal is positioned between the differential housing or the main body of the differential and the differential cover, and can fail due to age, vibrations, extreme temperatures, or general wear and tear. Damage to the differential gasket or an improperly-installed differential cover gasket can create oil leaks, affecting your vehicle's performance. Not only can oil leaks near the back of your vehicle indicate gasket failure, but whining or howling sounds from the rear of your car can indicate that you are low on fluid. Ignoring a failed differential cover gasket can cause irreparable damage to your differential and its gears, as well as affecting your vehicle's lifespan and performance, so it's best to perform any necessary repairs as soon as possible. Differential covers often have to be removed to drain or service the gear oil, and if this is necessary, you should also replace the differential cover gasket during your service. If you need a differential gasket, sealant, or gear oil to complete your next project, shop the options available O'Reilly Auto Parts. Discover helpful articles and videos within our How-To Hub for topics like what vehicle repairs can't wait, the symptoms of driveline failure, and how to change rear differential fluid. Keep your vehicle performing as you'd expect and prevent a more costly repair in the future with a replacement differential gasket from O'Reilly Auto Parts.