FAG SS3040 Automatic Transmission Oil Pump Seal - Front

Automatic Transmission Oil Pump Seal for OE-Style Service

The FAG SS3040 automatic transmission oil pump seal is built for front-position applications that need a precise sealing surface and stable retention under transmission fluid pressure. With a metal-and-spring seal design and nitrile sealing material, it is suited for service work on a wide range of Chevrolet, GMC, and select luxury vehicles.

Use FAG SS3040 when you need a transmission oil pump seal that matches the application-specific dimensions and sealing requirements of the original part. This part cross-references Gates 19939 for the same application.

Key Features

• Part number: SS3040
• Automatic transmission oil pump seal for front applications
• Seal type: metal with spring
• Sealing material: nitrile
• Bore diameter: 2.88 in. / 73.152 mm
• Seal outside diameter: 2.884 in. / 73.254 mm
• Seal width: 2 in. / 9.347 mm
• Engineered to help maintain a tight seal at the pump interface

Detailed Description

FAG SS3040 is a transmission sealing component designed around exact dimensional requirements for the oil pump area. The metal-and-spring construction helps maintain sealing contact, while the nitrile material is selected for transmission service conditions. This seal is used in front-position applications across many Chevrolet Express 2500, Chevrolet Silverado 2500 HD, GMC Savana 3500, and GMC Sierra 2500 HD models, along with additional listed vehicles from 1991 through 2009.

For buyers searching for a Chevrolet Silverado 2500 HD transmission oil pump seal, GMC Sierra 3500 front seal, or a FAG SS3040 replacement for GM truck and van applications, this part provides a direct-fit service option where the listed dimensions and fitment match the vehicle.

What It Helps Address

• Transmission fluid leakage at the oil pump seal area
• Loss of sealing tension from an aged or hardened seal
• Contamination entering the pump interface
• Service issues caused by incorrect seal dimensions
• Noise or drivability concerns related to transmission fluid loss

Installation Notes and Tips

• Verify bore diameter, outside diameter, and width before installation.
• Confirm the vehicle’s transmission application and front-position requirement against the fitment list.
• Inspect the pump surface and surrounding components for wear, scoring, or contamination before assembly.
• Clean the sealing area thoroughly so the nitrile lip can seat correctly.
• Use proper installation practices to avoid damaging the seal lip or spring.

Quality Assurance

FAG sources seals to meet vehicle manufacturer specifications and works with suppliers to maintain its quality standards. The design focus is on protecting wheel-end and sealing components from dirt, dust, and moisture while helping prevent grease or fluid loss over the service life of the bearing or assembly.

Compatible with listed applications including Chevrolet Express 2500, Chevrolet Silverado 2500 HD, GMC Savana 3500, and GMC Sierra 2500 HD, FAG SS3040 is a precise replacement choice for front automatic transmission oil pump seal service.