SKF 20042A Differential Pinion Seal - Rear

SKF Differential Pinion Seal 20042A

SKF 20042A is a differential pinion seal built for rear axle service where the pinion shaft must retain gear oil and keep road contaminants out. With a polyacrylate sealing surface, a 2.441-inch shaft diameter, 3.197-inch outside diameter, and 0.475-inch width, this seal is specified for precise sealing performance in demanding driveline applications.

Key Features

• Part number 20042A differential pinion seal for driveline and axle sealing service
• Polyacrylate sealing surface type for controlled contact at the shaft interface
• 2.441-inch shaft diameter, 3.197-inch outside diameter, and 0.475-inch width
• Fits rear axle applications on Ford F-250 Super Duty and Ford F-350 Super Duty
• Cross-references Ford BC3W4676AD for the same application

Detailed Description

SKF has a long history in seal engineering, and this differential pinion seal reflects that experience with application-specific design and premium materials. Part number 20042A is made for rear differential pinion sealing on 2011-2021 Ford F-250 Super Duty models with a 10.5-inch ring gear and 2011-2021 Ford F-350 Super Duty models with a Dana 70 axle. For buyers searching for a Ford F-250 Super Duty rear differential pinion seal or a Ford F-350 Super Duty Dana 70 axle pinion seal, this SKF seal provides the correct dimensions and sealing surface type for the job.

What It Helps Address

• Gear oil leakage at the differential pinion area
• Contamination entering the rear axle housing
• Wear-related sealing loss at the pinion shaft
• Service replacement needs on Ford Super Duty rear differentials

Installation Notes and Tips

Verify axle configuration before installation: 2011-2021 Ford F-250 Super Duty rear applications use the 10.5-inch ring gear note, while 2011-2021 Ford F-350 Super Duty rear applications use the Dana 70 axle note. Inspect the pinion shaft and seal bore for wear, clean the sealing surfaces thoroughly, and confirm the seal is seated squarely to maintain proper contact.

Quality Assurance

SKF designs and manufactures seals to high quality standards using premium materials and application-specific construction. The brand’s seal engineering heritage dates back to the first integrated shaft seal, and its products are built for long service life and dependable sealing performance in automotive driveline use.