SKF 13978 Differential Pinion Seal - Front or Rear

SKF Differential Pinion Seal 13978

SKF 13978 is a differential pinion seal built for front and rear axle applications where precise sealing matters. It is specified with a polyacrylate sealing surface and dimensions that support a proper fit at the pinion shaft.

Key Features

• Part number 13978 differential pinion seal from SKF
• Polyacrylate sealing surface type for controlled contact at the shaft
• Outside diameter: 2.649 in.
• Shaft diameter: 1.378 in.
• Width: 0.709 in.
• Engineered for driveline and axle sealing applications

Detailed Description

SKF 13978 is a differential pinion seal designed to help maintain lubricant at the pinion area while keeping road contaminants out of the axle assembly. SKF has a long history in seal engineering, and this part reflects that focus with premium materials and application-specific construction. The seal dimensions and polyacrylate sealing surface are important for maintaining the correct interface at the shaft and housing.

This part cross-references 3818901G00 and 145813978 for the same application. It is a direct-fit style option for Nissan Pickup, Nissan D21, Nissan Sentra, Nissan 200SX, Nissan Pathfinder, Nissan 720, Nissan Maxima, Nissan 280ZX, and Nissan 810 applications where the listed pinion seal dimensions and axle configuration match.

What It Helps Address

• Differential gear oil seepage at the pinion shaft
• Contamination entering the axle housing through a worn seal
• Noise or driveline concerns caused by low lubricant level
• Seal wear from age, heat, and road exposure
• Service needs on front or rear differential pinion locations

Installation Notes and Tips

• Verify shaft diameter, outside diameter, and width before installation.
• Inspect the pinion yoke and sealing surface for grooves or damage.
• Clean the housing bore and shaft area thoroughly before pressing in the seal.
• Use the correct axle position and configuration for the vehicle listed.
• Fits 1995-1997 Nissan Pickup, Front; 1987-1994 Nissan D21, Front; 1987-1990 Nissan Sentra, Rear; 1984-1988 Nissan 200SX, Rear, w/ R180 Diff.; 1987-1988 Nissan Pathfinder, Front; 1980-1986 Nissan 720, Front; 1986 Nissan D21, Front, From 5/86; 1982-1984 Nissan Maxima, Rear; 1979-1983 Nissan 280ZX, Rear, w/ R180 Diff.; 1977-1981 Nissan 810, Rear.

Quality Assurance

SKF manufactures seals to defined specifications using materials selected for the application and operating environment. The brand’s seal development history and production standards support consistent fit and long-term sealing performance in driveline service.