SKF 26378 Differential Pinion Seal - Rear

SKF 26378 Differential Pinion Seal

SKF 26378 is a differential pinion seal built for driveline sealing performance where the pinion shaft enters the axle housing. Its dual-lip construction adds a primary sealing lip and a secondary radial lip to help block dirt and water intrusion, while the Bore-Tite outer coating helps seal minor housing bore imperfections and reduce oil seepage.

For drivers and technicians searching for a differential pinion seal for axle service, SKF 26378 offers a LongLife sealing surface and precise dimensions for a 2.625 shaft diameter, 4.567 outside diameter, and 0.778 width. It is a practical choice for axle leak repair on vehicles such as Ford F-150 and Chevrolet Silverado applications where pinion seal replacement is part of routine driveline maintenance.

Key Features

• Dual-lip seal design for added protection against contamination
• Bore-Tite outer coating helps address minor bore scratches and imperfections
• LongLife sealing surface type for durable sealing performance
• Dimensions: 2.625 shaft diameter, 4.567 outside diameter, 0.778 width
• SKF 26378 differential pinion seal for axle and driveline service

Detailed Description

SKF 26378 is engineered as a differential pinion seal for the point where the pinion shaft passes through the axle housing. The dual-lip design creates two sealing barriers, helping keep gear oil contained while resisting contamination from road debris, moisture, and grime. The Bore-Tite coating on the seal’s outer diameter is designed to improve housing contact when the bore has light scratches or minor surface flaws. This makes SKF 26378 a strong fit for repair work on Ford F-150 and Chevrolet Silverado driveline systems where a leaking pinion seal can lead to fluid loss and driveline noise.

This part cross-references CHR 26378 and 15665326 for the same application.

What It Helps Repair

• Gear oil seepage at the differential pinion area
• Contamination entering the axle housing through a worn seal
• Leaks caused by minor housing bore imperfections
• Seal wear from age, heat, and driveline movement
• Maintenance issues on Ford F-150 and Chevrolet Silverado rear axle service

Installation Notes and Tips

Inspect the pinion yoke, shaft surface, and housing bore before installation. Clean the sealing area thoroughly and verify the bore is free of heavy scoring or corrosion. Confirm the seal dimensions match the application before pressing the seal into place, and check pinion preload and gear oil level after service.

Quality Assurance

SKF has more than 100 years of sealing and bearing engineering experience, and this seal is manufactured to SKF quality standards for long service life and safe operation. SKF 26378 is built for consistent driveline sealing performance in axle repair applications.