FAG SS3278 Differential Pinion Seal - Rear Inner

FAG SS3278 Differential Pinion Seal

The FAG SS3278 differential pinion seal is built for driveline sealing applications where keeping gear oil contained and contamination out matters. With a metal shell, spring, auxiliary lip, and polyacrylate sealing material, it is designed for a precise seal at the pinion area in the differential.

For buyers searching for a differential pinion seal for FAG SS3278, or a replacement seal for axle and driveline service on Honda Civic and similar applications, this part is specified around critical dimensions and sealing construction.

Key Features

• Part number: SS3278
• Differential pinion seal for driveline and axle sealing service
• Seal type: metal, spring, auxiliary lip, inner shell
• Polyacrylate sealing material for demanding sealing conditions
• Bore diameter: 3.543 in. / 89.992 mm
• Seal outside diameter: 3.548 in. / 90.119 mm
• Seal width: 2.75 in. / 69.85 mm

Detailed Description

FAG SS3278 is a differential pinion seal engineered to help maintain proper lubrication at the pinion interface while limiting the entry of dirt, dust, and moisture. The seal construction combines a metal shell with a spring-loaded sealing element and auxiliary lip to support consistent contact at the sealing surface. Its dimensions are listed at 3.543 inches bore diameter, 3.548 inches outside diameter, and 2.75 inches width, making dimensional accuracy important during replacement. This part cross-references SKF 27295 for the same application. When servicing driveline components on Honda Civic or other vehicle applications that use this seal specification, matching the seal dimensions and design is essential. FAG SS3278 is a practical choice for differential pinion seal replacement where OE-style sealing geometry is required.

What It Helps Address

• Gear oil seepage at the differential pinion area
• Contamination from road dirt, dust, and moisture
• Seal wear that can lead to lubricant loss
• Noise or driveline issues related to low differential fluid
• Replacement needs during axle or differential service

Installation Notes and Tips

Verify bore diameter, outside diameter, and seal width before installation. Inspect the pinion surface and surrounding housing for wear, scoring, or debris that could affect sealing performance. Clean the sealing area thoroughly and install the seal squarely to avoid distortion. Confirm the application by vehicle make, model, and position before ordering; this part is commonly searched for as a differential pinion seal for Honda Civic and related driveline service needs.

Quality Assurance

FAG specifies this seal using manufacturer-level dimensional and material requirements, with construction intended to meet vehicle application demands for differential sealing. The design focuses on protecting wheel end and driveline components from contamination while helping retain grease or lubricant over service life. Part number SS3278 is identified for precise replacement matching.