FAG SS2868 Differential Pinion Seal - Front or Rear

FAG SS2868 Differential Pinion Seal

FAG SS2868 is a differential pinion seal built with a nitrile sealing material and a metal spring design with an auxiliary lip. It is specified for front and rear driveline applications on select Ford, Lincoln, and Mazda vehicles, including Navigator, Expedition, and F-150 fitments.

Key Features

• Part number: SS2868
• Seal type: metal, spring, auxiliary lip
• Sealing material: nitrile
• Bore diameter: 2.777 in / 70.536 mm
• Seal outside diameter: 2.781 in / 70.637 mm
• Seal width: 1.813 in / 46.05 mm
• Designed for differential pinion sealing in driveline and axle service
• Cross-reference: Bosch 18190

Detailed Description

FAG SS2868 is engineered for differential pinion seal service where controlled sealing and contamination resistance are critical. The nitrile sealing material is paired with a metal spring and auxiliary lip to help maintain contact at the sealing surface, while the compact dimensions support proper fit in the specified axle applications. This part number is used across multiple Ford, Lincoln, and Mazda rear and front axle applications, including 1997-2017 Ford Expedition, 2004-2017 Ford F-150, and 1998-2019 Lincoln Navigator. The SS2868 designation is also associated with 2001-2010 Mazda B2300 rear, 1994-2010 Mazda B4000 rear, and 1994-2008 Mazda B3000 rear applications.

What It Helps Address

• Gear oil seepage at the differential pinion area
• Contamination from dirt, dust, and moisture entering the seal area
• Wear-related sealing loss at the pinion interface
• Service replacement for leaking front or rear axle pinion seals
• Fitment-specific repair needs on Ford Expedition, Ford F-150, and Lincoln Navigator driveline systems

Installation Notes and Tips

Verify bore diameter, seal outside diameter, and seal width before installation to confirm the seal matches the axle housing and pinion specification. Clean the sealing surface thoroughly and inspect the pinion yoke or shaft for wear, grooves, or corrosion before installing the new seal. Confirm whether the vehicle uses a front or rear application, since SS2868 is listed for both positions depending on model and year. Fits 1998-2019 Lincoln Navigator, front; fits 2000-2006 Lincoln Navigator, rear; fits 1997-2017 Ford Expedition, front; fits 2004-2017 Ford F-150, front; fits 2006-2008 Lincoln Mark LT, front; fits 2003-2005 Lincoln Aviator, rear; fits 2001-2010 Mazda B2300, rear; fits 1994-2017 Mazda B2300, rear; fits 1994-2010 Mazda B4000, rear; fits 1994-2008 Mazda B3000, rear; fits 1998-2001 Mazda B2500, rear; fits 1991-1994 Mazda Navajo, rear.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain FAG quality standards. The seal construction is intended to protect wheel end and driveline components from contamination while helping retain lubricant over the service life of the bearing or axle assembly.