FAG SS4425 Differential Pinion Seal - Rear

FAG SS4425 Differential Pinion Seal

The FAG SS4425 differential pinion seal is built for rear axle sealing where precise fit and dependable fluid retention matter. It is a direct-fit style seal for select Nissan Pathfinder and INFINITI QX4 applications, with dimensions and sealing materials matched to the vehicle’s driveline requirements.

Key Features

• Part number: SS4425
• Seal type: rubber with spring and auxiliary lip
• Sealing material: polyacrylate
• Bore diameter: 2.992 in. / 75.997 mm
• Seal outside diameter: 3.000 in. / 76.2 mm
• Seal width: 1.654 in. / 42.012 mm
• Designed for rear differential pinion sealing

Detailed Description

FAG SS4425 is a differential pinion seal engineered to help maintain proper sealing at the rear axle pinion area. Its rubber construction, spring-loaded design, and auxiliary lip work with the polyacrylate sealing material to support consistent contact at the sealing surface. The listed dimensions make it a precise replacement choice for vehicles that require this specific seal profile.

Compatible With 1997-2001 INFINITI QX4, Rear, and 1996-2001 Nissan Pathfinder, Rear. This part cross-references National 710245 for the same application. For shoppers searching for a rear differential pinion seal for Nissan Pathfinder or INFINITI QX4, SS4425 provides the fitment and dimensional details needed for a targeted replacement.

What It Helps Address

• Gear oil seepage at the rear differential pinion area
• Contamination entry from dirt, dust, and moisture
• Loss of lubricant at the pinion seal interface
• Wear-related sealing issues on the rear axle
• Replacement needs during driveline service on Pathfinder and QX4 models

Installation Notes and Tips

Verify bore diameter, outside diameter, and seal width against the original part before installation. Inspect the pinion shaft and sealing surface for wear, scoring, or corrosion, since surface condition can affect seal performance. Clean the housing thoroughly and install the seal squarely to avoid distortion of the sealing lip.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain its quality standards. The SS4425 is built for demanding wheel-end and driveline sealing requirements, with materials selected to help protect components over the life of the bearing and seal assembly.