SKF 19438 Differential Pinion Seal - Rear

SKF 19438 Differential Pinion Seal

The SKF 19438 differential pinion seal is built for rear axle sealing applications where lubricant retention and contamination control are critical. It is a direct-fit style seal for select Oldsmobile and Pontiac rear differential applications, including Oldsmobile 88 and 98 and Pontiac Bonneville, Catalina, and Grand Prix.

Key Features

• Part number 19438 differential pinion seal for rear driveline service
• Outside diameter: 3.067 in.
• Shaft diameter: 1.938 in.
• Width: 0.500 in.
• Silicone sealing surface type for sealing performance in demanding axle environments
• Engineered by SKF, a long-established seal manufacturer with extensive sealing design experience

Product Details

SKF 19438 is a differential pinion seal designed to help maintain proper lubrication at the pinion area of the rear axle. SKF has a long history in seal development and uses premium materials and application-specific designs to match the operating environment of the part. This seal is listed for rear fitment on 1953-1962 Oldsmobile 98, 1954-1957 Oldsmobile 88, 1957-1962 Pontiac Bonneville, 1957-1962 Pontiac Catalina, and 1962 Pontiac Grand Prix. If you are servicing a rear differential on these vehicles, part number 19438 is the correct reference to verify before installation.

This part cross-references Continental 49722 for the same application.

What It Helps Address

• Rear differential gear oil seepage at the pinion seal area
• Contamination entering the axle housing through a worn seal
• Lubricant loss that can affect differential operation
• Noise or wear concerns associated with low axle fluid level
• Service replacement needs on classic Oldsmobile and Pontiac rear axles

Installation Notes and Tips

Confirm axle dimensions and seal measurements before installation. Verify the shaft diameter, outside diameter, and width against the original seal and inspect the pinion yoke surface for wear, grooves, or corrosion that could affect sealing. Clean the sealing bore thoroughly and install the seal squarely to avoid distortion. For best results, check the rear differential fluid level after service and inspect for leaks during the initial road test.

Quality Assurance

SKF seals are manufactured to defined design standards using materials selected for the application and operating environment. The brand’s seal engineering background supports consistent fit and sealing performance in driveline service.