FAG SS2637 Differential Pinion Seal - Commutator End, Front or Rear

FAG SS2637 Differential Pinion Seal

FAG SS2637 is a differential pinion seal built with a metal and spring seal design and Viton sealing material for demanding driveline service. It is specified for a wide range of BMW, Ford, Audi, Nissan, Volkswagen, Volvo, Lincoln, and GMC applications where precise sealing at the pinion or related shaft location is required.

Key Features

• Part number: SS2637
• Seal type: metal with spring
• Sealing material: Viton
• Bore diameter: 2.047 in / 51.994 mm
• Seal outside diameter: 2.054 in / 52.172 mm
• Seal width: 1.575 in / 7.01 mm
• Built for driveline sealing applications where contamination control matters

Detailed Description

FAG SS2637 is engineered to help maintain a tight seal at the differential pinion area and other listed positions across multiple vehicle platforms. The Viton sealing material is selected for durability in demanding operating conditions, while the metal and spring construction supports consistent sealing contact. This part cross-references Dorman - HELP 15803 for the same application. The SS2637 part number is also associated with Schaeffler global number 413 2637 100.

Compatible With BMW 320i, front; BMW 325Ci, front; BMW 330i, front; BMW M3, front; BMW Z4, front; Ford F-250 Super Duty, rear; Ford F-350 Super Duty, rear; and Audi TT Quattro, rear applications listed in the fitment data. It also appears in additional BMW, Ford, Audi, Nissan, Volkswagen, Volvo, Lincoln, and GMC listings across the model years shown.

What It Helps Address

• Gear oil seepage at the pinion seal area
• Contamination from dirt, dust, and moisture entering the sealed area
• Loss of lubricant around the differential or shaft seal point
• Noise or wear concerns related to low lubricant retention
• Service replacement for worn or hardened original seals

Installation Notes and Tips

Verify bore diameter, outside diameter, and seal width before installation. Confirm the vehicle position exactly as listed, since this part is used in front, rear, N/A, and commutator end applications depending on the vehicle. Clean the sealing surface thoroughly and inspect the mating shaft or pinion surface for wear before installing the new seal. For fitment-specific service, use the exact year, make, model, and position shown in the vehicle list.

Quality Assurance

FAG designs seals to meet vehicle manufacturer specifications and works with suppliers to maintain FAG quality standards. The seal construction and Viton material are selected to support reliable sealing performance in the listed driveline applications.