SKF 21172 Automatic Transmission Oil Pump Seal - Front

SKF 21172 Automatic Transmission Oil Pump Seal

SKF 21172 is an automatic transmission oil pump seal built around a nitrile sealing surface for dependable fluid control in the transmission assembly. It is sized with a 2.125 shaft diameter, 3.005 outside diameter, and 0.438 width for the specified application.

Compatible with 1950-1952 Chevrolet Bel Air front applications, this SKF transmission seal supports clean sealing at the oil pump area where fluid retention matters. The SKF 21172 is also cross-referenced to AP Exhaust 30024 for the same application.

Key Features

• Automatic transmission oil pump seal for transmission sealing systems
• Nitrile sealing surface type for fluid sealing performance
• 2.125 shaft diameter for the listed fitment
• 3.005 outside diameter and 0.438 width
• Fits 1950-1952 Chevrolet Bel Air, front
• SKF part number 21172 for catalog and service lookup

Detailed Description

SKF 21172 is engineered as a transmission oil pump seal for vehicles that require a precise seal at the pump interface. SKF has a long history in seal design and manufacturing, and this part reflects that focus with application-specific dimensions and premium sealing materials. For 1950-1952 Chevrolet Bel Air front applications, the seal helps maintain proper transmission fluid containment at the oil pump area while keeping contaminants out of the system.

Use SKF 21172 when servicing a 1950 Chevrolet Bel Air, 1951 Chevrolet Bel Air, or 1952 Chevrolet Bel Air front application that calls for this seal size and design. The part number 21172 is useful when matching service records, catalog listings, or interchange references during transmission repair.

What This Seal Helps Address

• Transmission fluid leakage at the oil pump seal area
• Contamination entering the transmission through a worn seal
• Loss of sealing integrity from age, heat, or fluid exposure
• Service issues caused by an incorrect seal size
• Repeat repairs when the pump seal no longer holds fluid properly

Installation Notes and Tips

Verify shaft diameter, outside diameter, and width before installation to confirm the seal matches the transmission pump bore and shaft dimensions. Inspect the sealing surface and surrounding components for wear, scoring, or debris before assembly. Clean the sealing area thoroughly and install the seal squarely to avoid distortion or premature wear. Confirm the application against the vehicle service information for 1950-1952 Chevrolet Bel Air front fitment.

Quality Assurance

SKF manufactures seals to specific designs using materials selected for the application and operating environment. The brand’s seal engineering background and controlled manufacturing standards support consistent fit and sealing performance for transmission service.