SKF 19310 Differential Pinion Seal - Rear

SKF 19310 Differential Pinion Seal

The SKF 19310 differential pinion seal is built for rear differential service where shaft diameter, outside diameter, and sealing surface material all need to match the application. It is a direct-fit sealing component for select Pontiac and Oldsmobile rear axle applications, including 1963-1965 Pontiac Bonneville, Catalina, and Grand Prix, plus 1963-1964 Oldsmobile 98.

Key Features

• Part number 19310 differential pinion seal for rear driveline service
• 1.938 shaft diameter for the specified pinion shaft application
• 2.888 outside diameter for proper housing fit
• 0.313 width for the listed seal profile
• Polyacrylate sealing surface type for durable sealing performance
• Fits 1963-1965 Pontiac Bonneville, rear
• Fits 1963-1965 Pontiac Catalina, rear
• Fits 1963-1965 Pontiac Grand Prix, rear
• Fits 1963-1964 Oldsmobile 98, rear

Detailed Description

SKF has a long history in shaft seal engineering, and the 19310 differential pinion seal reflects that focus with application-specific dimensions and premium sealing materials. This seal is designed to help maintain lubricant retention at the differential pinion area while keeping road contaminants out of the rear axle assembly. For restorations and repairs on Pontiac Bonneville, Pontiac Catalina, Pontiac Grand Prix, and Oldsmobile 98 rear differentials, SKF 19310 provides the dimensional match needed for service work on the pinion seal location.

This part cross-references 47422 and 127968R91 for the same application.

What It Helps Address

• Differential gear oil seepage at the pinion seal area
• Contamination entering the rear axle housing
• Seal wear from age, heat, and lubricant breakdown
• Noise or driveline issues caused by low differential fluid level
• Service needs on rear axle sealing during differential maintenance

Installation Notes and Tips

Confirm the shaft diameter, outside diameter, and width against the original seal before installation. Inspect the pinion yoke and sealing surface for grooves or wear, since an uneven surface can shorten seal life. Clean the housing bore thoroughly and verify the rear differential application before assembly. For best results, install the seal squarely and check pinion area condition during reassembly.

Quality Assurance

SKF designs and manufactures seals to specific application requirements using materials selected for the operating environment. The 19310 is produced to support long service life and dependable sealing performance in rear driveline use.