FAG SS3077 Differential Pinion Seal - Front

FAG SS3077 Differential Pinion Seal

The FAG SS3077 differential pinion seal is built for front axle applications that require precise sealing at the pinion area. It uses a metal case, spring, and auxiliary lip design with Viton sealing material to help maintain a tight seal against gear oil leakage and outside contamination.

Compatible with select Ram and Dodge Ram front differential applications, including 2011-2018 Ram 2500 and Ram 3500 front models with a 9.25-inch ring gear and American Axle, as well as 2003-2010 Dodge Ram 2500 and Ram 3500 front models with the same axle configuration. This part cross-references National 710558 for the same application.

Key Features

• Part number: SS3077
• Differential pinion seal for front axle service
• Seal type: metal case, spring, and auxiliary lip
• Sealing material: Viton
• Bore diameter: 2.914 in. / 74.016 mm
• Outside diameter: 2.922 in. / 74.219 mm
• Seal width: 2.125 in. / 53.975 mm
• Designed for applications that require controlled sealing at the pinion shaft

Product Details

FAG SS3077 is a differential pinion seal engineered to match demanding axle sealing requirements. The Viton sealing material is selected for durability in drivetrain environments, while the metal, spring, and auxiliary lip construction helps maintain contact and sealing performance around the pinion area. For Ram 2500 and Ram 3500 front axle service, this seal is specified for 9.25-inch ring gear applications with American Axle, making SS3077 a direct-fit service part for the listed vehicles. The FAG SS3077 also aligns with OE-style sealing dimensions for accurate replacement during differential repair.

What It Helps Address

• Gear oil seepage at the differential pinion area
• Contamination from dirt, dust, and moisture entering the axle housing
• Loss of lubricant that can affect differential operation
• Wear-related sealing failure during front axle service
• Replacement needs on Ram 2500 and Ram 3500 front differential repairs

Installation Notes and Tips

Verify axle configuration, ring gear size, and vehicle application before installation. This seal is listed for front position use on the specified Ram and Dodge Ram models, including 9.25-inch ring gear American Axle setups. Inspect the pinion surface, housing bore, and surrounding components for wear or damage before installing the new seal. Proper seating and alignment are important to help prevent leaks after service.

Quality Assurance

FAG states that its seals are produced with high-quality materials and built to meet vehicle manufacturer specifications. The brand works with suppliers to develop seals that meet FAG quality standards for drivetrain sealing applications.