SKF 18276 Differential Pinion Seal - Rear

SKF Differential Pinion Seal 18276

SKF differential pinion seal 18276 is built for rear axle sealing where lubricant retention and contamination control are critical. It is a direct-fit style seal for select Ford Thunderbird and Mercury Colony Park applications, with dimensions that support accurate shaft and housing sealing.

• Part number: 18276
• Outside diameter: 4.128 in.
• Shaft diameter: 1.813 in.
• Width: 0.531 in.
• Nitrile sealing surface for axle seal applications
• Fits rear differential pinion locations

Fitment Details

Fits 1957 Ford Thunderbird, rear. Fits 1958-1959 Ford Thunderbird, rear. Fits 1957 Mercury Colony Park, rear. Fits 1958 Mercury Colony Park, rear, early.

This part cross-references Dorman - HELP 46100 for the same application.

What It Helps Address

• Gear oil seepage at the differential pinion area
• Contamination entering the rear axle housing
• Seal wear from age, heat, and lubricant breakdown
• Noise or driveline issues related to low axle lubricant level

Installation Notes

Verify shaft diameter, outside diameter, and width before installation to confirm the seal matches the axle housing and pinion surface. Clean the sealing bore and shaft surface thoroughly, and inspect for grooves or wear that could affect sealing performance. Use the correct lubricant during assembly and follow the vehicle service procedure for rear differential service.

Quality Assurance

SKF has a long history in seal engineering and uses premium materials and application-specific designs to support proper sealing performance. The 18276 differential pinion seal is manufactured to quality standards intended to support long service life and dependable operation in rear axle environments.