FAG SS2948 Differential Pinion Seal - Front or Rear

FAG SS2948 Differential Pinion Seal

FAG SS2948 is a differential pinion seal built for axle applications that need reliable sealing at the pinion area. It uses a metal case, spring, and auxiliary lip design with polyacrylate sealing material to help keep gear oil contained while blocking dirt, dust, and moisture.

Compatible With a wide range of Ford, Dodge, Chevrolet, GMC, Jeep, Jaguar, and Lincoln driveline applications, including Ford F-250 and F-350 rear axle service, Dodge Ram 2500 and Ram 3500 axle setups, and Chevrolet/GMC heavy-duty rear axles. Part number SS2948 is also referenced in OE-style service listings for multiple Dana and Spicer axle configurations.

Key Features

• Metal, spring, and auxiliary lip seal construction
• Polyacrylate sealing material for axle and driveline service
• Outside diameter: 3.165 in. / 80.391 mm
• Bore diameter: 3.16 in. / 80.264 mm
• Seal width: 1.875 in. / 47.625 mm
• Engineered to help retain lubricant and block contamination at the pinion area

Detailed Description

FAG SS2948 is a differential pinion seal designed for demanding axle environments where consistent sealing performance matters. The seal’s metal case supports fitment stability, while the spring-loaded lip and auxiliary lip help maintain contact at the sealing surface. Polyacrylate material is used for the sealing element to support service in driveline applications exposed to heat, road debris, and moisture. This part number SS2948 appears across many rear axle and select front axle applications, including Ford E-250, Ford E-350 Super Duty, Dodge Ram 2500, Dodge Ram 3500, and Chevrolet C3500/K3500 service listings.

This part cross-references Anchor 9316 and Gates 18891 for the same application.

What It Helps Address

• Gear oil leakage at the differential pinion area
• Contamination from dirt, dust, and moisture entering the axle
• Lubricant loss that can affect bearing and gear protection
• Seal wear in Dana and Spicer axle service applications
• Noise or driveline concerns related to low lubricant level

Installation Notes and Tips

Verify axle type, position, and seal dimensions before installation. Confirm bore diameter, outside diameter, and seal width against the original part or service specification. Clean the sealing surface thoroughly and inspect the pinion yoke or shaft for wear, grooves, or corrosion before installing the new seal. For vehicles such as Ford F-350 rear axle applications or Dodge Ram 3500 front axle service, confirm the exact axle configuration and notes listed for the vehicle.

Quality Assurance

FAG designs seals using high-quality materials and works with suppliers to meet manufacturer specifications for the application. SS2948 is built to support the sealing demands of axle and driveline service across a broad range of confirmed vehicle listings.