SKF 18948 Differential Pinion Seal - Rear

SKF 18948 Differential Pinion Seal

SKF 18948 is a differential pinion seal built for rear axle sealing performance where lubricant retention and contamination control matter. It is specified with a nitrile sealing surface and precise dimensions for the shaft and housing interface, making it a direct-fit service part for select Cadillac DeVille rear applications.

Key Features

• Nitrile sealing surface for dependable fluid sealing in driveline service
• Outside diameter: 3.749 in.
• Shaft diameter: 1.875 in.
• Width: 0.430 in.
• Engineered by SKF for differential pinion seal applications
• Cross-reference part numbers include 1458709 and 975918948

Detailed Description

SKF 18948 is a differential pinion seal designed for rear axle service on 1953-1956 Cadillac DeVille and 1958-1959 Cadillac DeVille models. The seal uses a nitrile sealing surface and is manufactured to specific dimensional requirements so it can maintain the seal at the pinion shaft area, where gear oil retention is critical. SKF has a long history in seal design and bonding methods, and this part reflects that focus on controlled material selection and application-specific fit. For buyers searching for a Cadillac DeVille rear differential pinion seal or SKF 18948 replacement, this part matches the listed OE-style application data.

What It Helps Address

• Rear differential gear oil leakage at the pinion area
• Contamination entering the axle housing through a worn seal
• Oil seepage that can leave residue around the rear axle
• Seal wear caused by age, heat, and driveline use
• Service replacement needs on Cadillac DeVille rear differential applications

Installation Notes and Tips

Verify the shaft diameter, outside diameter, and width before installation to confirm the seal matches the axle housing and pinion interface. Inspect the pinion yoke and sealing surface for wear or scoring, since a damaged contact surface can shorten seal life. Clean the bore thoroughly and install the seal squarely to avoid distortion. This part fits 1953-1956 Cadillac DeVille, rear, and 1958-1959 Cadillac DeVille, rear, w/o Carrier No. 1473735 & 1473782.

Quality Assurance

SKF manufactures seals to defined application specifications using premium materials selected for the operating environment. The brand’s seal engineering heritage and production standards support consistent fit and long service life in driveline sealing applications.