FAG SS3187 Transfer Case Output Shaft Seal - Rear

Transfer Case Output Shaft Seal for Ram

The FAG SS3187 transfer case output shaft seal is built for rear transfer case applications on select Dodge Ram and Ram 2500/3500 trucks. It uses a nitrile sealing material with a metal case, spring, and auxiliary lip to help retain lubricant and block contamination at the transfer case output.

Key Features

• Transfer case output shaft seal for rear applications
• Nitrile sealing material for dependable sealing performance
• Metal case with spring and auxiliary lip design
• Bore diameter: 3.325 in. / 84.455 mm
• Seal outside diameter: 3.335 in. / 84.709 mm
• Seal width: 2.3 in. / 58.42 mm
• Cross-references National 710902 and Remy 23000 for the same application

Detailed Description

FAG SS3187 is a transfer case output shaft seal engineered for rear-position use on Dodge Ram and Ram trucks with New Process 271 and New Process 273 transfer cases in the listed applications. The seal’s metal, spring-loaded, auxiliary-lip construction is designed to maintain a tight seal at the output shaft while helping keep dirt, dust, and moisture out of the transfer case area. Its nitrile sealing material is selected for sealing performance in drivetrain service, where lubricant retention and contamination control are critical. This part number is also referenced as FAG SS3187 in catalog listings for Ram 2500 and Ram 3500 coverage.

Compatible With 2011-2012 Ram 2500, rear; 2011-2012 Ram 3500, rear; 2010 Dodge Ram 2500, rear; 2003-2010 Dodge Ram 3500, rear; 2003-2009 Dodge Ram 2500, rear; 2007 Dodge Ram 1500, rear; and additional listed rear transfer case applications for Dodge Ram 2500 and Ram 3500 models. Use FAG SS3187 when the vehicle calls for the specified transfer case seal dimensions and rear output shaft location.

What This Part Helps Address

• Transfer case fluid seepage at the output shaft
• Contamination entering the transfer case from road debris or moisture
• Loss of lubricant around the rear transfer case seal area
• Wear-related sealing issues on high-mileage drivetrain components
• Replacement needs during transfer case service on Ram 2500, Ram 3500, and Ram 1500 applications

Installation Notes and Tips

Verify the transfer case model, rear output location, and seal dimensions before installation. Clean the bore and shaft sealing surface thoroughly, and inspect the output shaft for grooves or damage that could affect sealing. Confirm the application against the vehicle’s transfer case identification, especially on Dodge Ram 2500 and Ram 3500 trucks with New Process 271 or 273 units. FAG SS3187 should be matched to the exact seal size and configuration listed for the vehicle.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain its quality standards. The SS3187 is built to the dimensional and material requirements needed for transfer case sealing service on the listed Ram and Dodge applications.