SKF 17779A Differential Pinion Seal - Rear

SKF Rear Axle Pinion Seal for Toyota and Lexus

SKF 17779A is a rear differential pinion seal built for rear axle service on select Toyota and Lexus applications. It is designed around the seal dimensions and sealing surface material needed to retain gear oil and help keep road contaminants out of the axle housing.

Compatible With Toyota Tundra rear applications with a 9.5" ring gear, as well as rear axle service on Toyota Land Cruiser and Lexus LX570 and LX470 models. The SKF Pinion Seal-Rear Axle line focuses on precise sealing performance for driveline service where the pinion shaft passes through the differential housing.

Key Features

• Part number 17779A rear differential pinion seal
• Outside diameter: 2.922 in.
• Shaft diameter: 1.771 in.
• Width: 0.433 in.
• Polyacrylate sealing surface type for axle sealing applications
• Designed for rear axle pinion service on select Toyota and Lexus vehicles

Product Details

SKF has a long history in seal engineering, and this rear axle pinion seal reflects that focus on material selection and dimensional accuracy. The 17779A is specified with a 2.922-inch outside diameter, 1.771-inch shaft diameter, and 0.433-inch width, helping ensure the seal seats correctly in the differential housing and maintains contact at the pinion shaft. For drivers searching for a Toyota Tundra rear pinion seal or a Lexus LX570 rear differential seal, this part number provides a direct service replacement for the listed applications. This part cross-references 9031145028 for the same application.

What It Helps Address

• Gear oil seepage at the rear differential pinion area
• Contamination entering the axle housing through the pinion opening
• Seal wear from age, heat, and driveline use
• Service replacement needs during rear axle maintenance
• Noise or driveline issues related to low lubricant level from leakage

Installation Notes and Tips

Verify the pinion seal dimensions against the housing and shaft before installation. Inspect the pinion yoke, shaft surface, and surrounding housing for wear or scoring, since a damaged sealing surface can shorten seal life. Clean the bore thoroughly and install the seal squarely to avoid distortion. Confirm rear axle fitment for the exact vehicle configuration before ordering, especially on Toyota Tundra rear applications with a 9.5" ring gear.

Quality Assurance

SKF manufactures seals to defined design and material standards, using premium materials selected for the application and operating environment. The brand’s seal engineering background and long-running OE-focused manufacturing approach support consistent fit and sealing performance for rear axle service.