SKF 15779 Differential Pinion Seal - Rear

SKF 15779 Differential Pinion Seal

SKF 15779 is a differential pinion seal built for rear axle service on select Buick and Oldsmobile applications. It is specified with a 1.563 shaft diameter, 2.879 outside diameter, and a 0.313 width, with a polyacrylate sealing surface type for controlled sealing performance in driveline use.

Key Features

• Part number 15779 differential pinion seal for rear driveline sealing service
• 1.563 shaft diameter for the specified pinion shaft application
• 2.879 outside diameter for proper housing fitment
• 0.313 width for the listed seal profile
• Polyacrylate sealing surface type
• Compatible with 1961-1963 Buick Skylark, rear
• Compatible with 1961-1963 Oldsmobile Cutlass, rear

Detailed Description

SKF has a long history in seal engineering, beginning with the first integrated shaft seal in 1928 and continuing with designs that use premium materials matched to the application and operating environment. This SKF 15779 differential pinion seal is made for rear axle use where the pinion area must retain lubricant and keep road contaminants out. It cross-references Monroe Shocks & Struts 172286 and 182286 for the same application. For buyers searching for a rear differential pinion seal for 1961-1963 Buick Skylark or 1961-1963 Oldsmobile Cutlass, part number 15779 provides the listed dimensions and sealing surface type needed for a proper service replacement.

What It Helps Address

• Gear oil seepage at the differential pinion area
• Contamination entering the rear axle housing
• Seal wear from age, heat, and driveline use
• Loss of lubricant that can affect differential operation
• Service replacement needs on rear axle seal repairs

Installation Notes and Tips

Verify the shaft diameter, outside diameter, and width against the original seal before installation. Inspect the pinion yoke and sealing surface for wear, scoring, or corrosion, since surface condition affects seal life. Clean the housing bore thoroughly and install the seal squarely to avoid distortion. Confirm rear axle application and vehicle fitment for 1961-1963 Buick Skylark and 1961-1963 Oldsmobile Cutlass before final assembly.

Quality Assurance

SKF manufactures seals to high quality standards and uses application-specific materials and bonding methods developed from extensive seal engineering experience. Part number 15779 is built for long service life in driveline sealing applications and is backed by SKF’s established manufacturing approach.