FAG SS2640 Manual Transmission Output Shaft Seal - Left

Manual Transmission Output Shaft Seal for OE-Style Service

The FAG SS2640 manual transmission output shaft seal is built for applications that need a precise sealing fit at the transmission output shaft. With a nitrile sealing material, rubber construction, spring tension, and auxiliary lip design, it helps maintain a clean sealing surface and control fluid retention in demanding driveline service.

Compatible with select Ford Fiesta, Ford Focus, Ford Courier, Ford F-250 Super Duty, Ford F-350 Super Duty, Chevrolet Silverado 2500 HD, Chevrolet Silverado 3500, GMC Sierra 2500 HD, GMC Sierra 3500, Lexus LS400, Lexus SC400, Toyota Camry, and Pontiac Sunburst applications, FAG SS2640 is sized for applications that call for a 40 x 55 x 8 seal profile.

Key Features

• Manual transmission output shaft seal for driveline sealing service
• Nitrile sealing material for oil-resistant performance
• Rubber seal body with spring and auxiliary lip design
• Seal dimensions: 2.165 in bore diameter, 2.176 in outside diameter, 1.575 in width
• Metric size reference: 54.991 mm bore, 55.27 mm outside diameter, 8.001 mm width
• Cross-reference part numbers include Dorman HELP 15815 and 40x55x8 / 4132640100

Detailed Description

FAG SS2640 is a transmission sealing component engineered to match the dimensional requirements of specific manual transmission output shaft applications. The seal uses nitrile as the sealing material, paired with a rubber body, spring tension, and auxiliary lip to help maintain contact at the shaft interface. Its 40 x 55 x 8 sizing makes it a direct-reference option for vehicles that require this exact seal profile.

This part number appears in fitment for 2011-2016 Ford Fiesta, 2000-2004 Ford Focus, 2001-2012 Ford Courier, 1999-2010 Ford F-250 Super Duty, 1999-2010 Ford F-350 Super Duty, 2001-2006 Chevrolet Silverado 2500 HD, 2001-2006 Chevrolet Silverado 3500, 2001-2006 GMC Sierra 2500 HD, 2001-2006 GMC Sierra 3500, 1990-2000 Lexus LS400, 1992-2000 Lexus SC400, 1990 Toyota Camry, and 1985-1988 Pontiac Sunburst. For shoppers searching for a Ford Fiesta manual transmission output shaft seal or a Ford Focus transmission seal, SS2640 provides the specified dimensions and construction.

What It Helps Address

• Transmission fluid seepage at the output shaft
• Contamination from dirt, dust, and moisture entering the seal area
• Wear-related sealing loss at the shaft interface
• Incorrect seal sizing when replacing a 40 x 55 x 8 transmission seal
• Service needs on Ford Fiesta, Ford Focus, and other listed applications

Installation Notes and Tips

Verify the bore diameter, outside diameter, and width before installation to confirm the seal matches the transmission housing and shaft specification. Inspect the shaft surface for grooves, corrosion, or scoring before fitting the new seal, and make sure the sealing lip seats evenly during installation. Use the vehicle application details and position notes in the fitment data, including N/A and Left listings where shown, to confirm the correct service location.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain its quality standards. The seal construction is selected to protect end components from contamination and help prevent grease or fluid loss over the service life of the bearing or transmission assembly.