SKF 25970 Differential Pinion Seal - Front or Rear

SKF 25970 Differential Pinion Seal

SKF 25970 is a differential pinion seal built for rear axle sealing service where gear oil retention and contamination control matter. With a polyacrylate sealing surface, a 2.598 shaft diameter, 3.486 outside diameter, and 0.438 width, it is specified for select Chevrolet and GMC rear axle applications.

Compatible With 1975-1981 Chevrolet C30, rear; 1977-1981 Chevrolet K30, rear; 1975-1981 Chevrolet P30, rear; 1979-1981 GMC C3500, rear; 1979-1981 GMC K3500, rear; 1979-1981 GMC P3500, rear; 1968-1972 Chevrolet C20 Suburban, rear; and 1968-1972 Chevrolet K20 Suburban, rear. This part number, SKF 25970, also cross-references Continental 49428 for the same application.

Key Features

• Differential pinion seal for rear axle service
• Polyacrylate sealing surface for sealing performance in driveline use
• 2.598 shaft diameter for the specified axle interface
• 3.486 outside diameter and 0.438 width for dimensional match
• Engineered by SKF, a seal manufacturer with long-standing OE-level design experience
• Part number 25970 for catalog and interchange lookup

Detailed Description

SKF 25970 is designed for rear differential pinion sealing on select Chevrolet and GMC trucks and vans, including Chevrolet C30, K30, P30, C20 Suburban, K20 Suburban, and GMC C3500, K3500, P3500 applications. The seal helps maintain proper lubricant retention at the pinion area while limiting the entry of dirt and moisture into the axle assembly. SKF uses premium materials and application-specific designs to match the demands of the operating environment, which is important in driveline sealing where heat, rotation, and lubricant exposure are constant factors. If you are servicing a rear axle leak on a Chevrolet C30 or GMC K3500, SKF 25970 provides a direct-fit sealing solution for the listed applications.

What It Helps Fix

• Rear differential pinion oil leaks
• Gear oil seepage around the pinion area
• Contamination entering the axle housing through a worn seal
• Noise or wear concerns caused by low differential lubricant level
• Seal deterioration from age, heat, and driveline exposure

Installation Notes and Tips

Confirm axle type and seal dimensions before installation, especially on H052, H072, and H110 axle applications listed in the fitment notes. Inspect the pinion yoke and sealing surface for wear, scoring, or corrosion before installing SKF 25970. Clean the bore and mating surfaces thoroughly so the new seal seats evenly and seals correctly. Verify the rear axle application against the vehicle year, make, model, and position shown in the fitment data.

Quality Assurance

SKF has a long history in seal engineering and manufactures sealing products to specific designs using quality materials for driveline service. The brand’s focus on dimensional accuracy and application-based construction supports consistent sealing performance in the listed Chevrolet and GMC rear axle applications.