FAG SS6392 Differential Pinion Seal - Rear or Rear Outer

FAG SS6392 Differential Pinion Seal

FAG SS6392 is a differential pinion seal built with Viton sealing material and a metal spring design with an auxiliary lip. It is specified for rear axle applications on a wide range of Ford, Lincoln, and Transit vehicles, including Ford F-150, Expedition, and Navigator models.

Key Features

• Part number SS6392 for rear differential pinion seal applications
• Seal type: metal, spring, and auxiliary lip construction
• Sealing material: Viton for demanding driveline sealing conditions
• Bore diameter: 3.092 in. / 78.537 mm
• Seal outside diameter: 3.096 in. / 78.638 mm
• Seal width: 1.813 in. / 46.05 mm
• Cross-reference: SKF 18062A

Detailed Description

FAG SS6392 is engineered for rear differential pinion sealing where accurate dimensions and durable sealing materials matter. The Viton sealing element is paired with a metal spring and auxiliary lip to help maintain a consistent seal at the pinion area, where gear oil retention and contamination control are critical. This part number SS6392 is used across many Ford rear axle applications, including Ford F-150, Ford Expedition, Ford Transit-150, Ford Transit-250, Ford Transit-350, Ford Mustang, Lincoln Navigator, and related E-Series and Super Duty platforms.

This part cross-references SKF 18062A for the same application.

What It Helps Address

• Rear differential gear oil leakage at the pinion seal
• Contamination from dirt, dust, and moisture entering the axle housing
• Seal wear from age, heat, and driveline use
• Noise or driveline service concerns tied to low lubricant level
• Replacement needs on Ford F-150, Expedition, and Navigator rear axle service

Installation Notes and Tips

Verify axle configuration, ring gear size, and application notes before ordering. Confirm the bore diameter, outside diameter, and seal width match the original seal and the axle housing specification. For listed fitments such as Fits 2015-2019 Ford F-150, Rear with HD Payload Package and 9.75" ring gear, or Fits 2015-2019 Ford Transit-150, Rear with 9.75" ring gear, application details matter for correct selection. Inspect the pinion yoke and sealing surface for wear before installation, and replace any damaged surface that could affect sealing performance.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain its quality standards. The seal construction and material selection are intended to meet demanding wheel-end and driveline sealing requirements across the listed Ford, Lincoln, and Transit applications.