FAG SS3209 Differential Pinion Seal - Rear

FAG SS3209 Differential Pinion Seal

The FAG SS3209 differential pinion seal is built for driveline sealing applications where contamination control and lubricant retention matter. With a Viton sealing material, metal construction, spring tension, and an auxiliary lip, this seal is engineered for a precise fit and dependable sealing performance in the differential pinion area.

Use this differential pinion seal when servicing driveline and axle sealing systems on vehicles that require a 4.498 in bore diameter, 4.504 in outside diameter, and 0.375 in seal width. FAG SS3209 is a technical replacement part for owners and technicians looking for a differential pinion seal that matches OE-style dimensional requirements.

Key Features

• Brand: FAG
• Part number: SS3209
• Part type: Differential pinion seal
• Seal type: Metal, spring, auxiliary lip
• Sealing material: Viton
• Bore diameter: 4.498 in (114.249 mm)
• Seal outside diameter: 4.504 in (114.402 mm)
• Seal width: 0.375 in (2.375 mm)

Detailed Description

FAG SS3209 is designed for differential pinion sealing where accurate dimensions and durable sealing materials are critical. The Viton sealing element is selected for demanding driveline environments, while the metal case, spring, and auxiliary lip help maintain sealing contact and resist contamination from dirt, dust, and moisture. This makes the SS3209 a practical choice for differential service work on applications that require a pinion seal with these exact specifications. If you are sourcing a FAG differential pinion seal for a driveline repair, SS3209 provides the dimensional profile needed for a proper replacement. This part cross-references Dorman - HELP 23751 for the same application.

What It Helps Fix

• Gear oil leakage at the differential pinion area
• Contamination entering the pinion seal interface
• Loss of lubricant from worn or damaged sealing surfaces
• Noise or driveline wear related to low differential fluid
• Seal replacement needs during differential service

Installation Notes and Tips

Verify bore diameter, outside diameter, and seal width before installation to confirm the correct differential pinion seal for your application. Inspect the pinion yoke and sealing surface for wear, scoring, or corrosion before pressing in the new seal. Clean the housing thoroughly and install the seal squarely to avoid distortion. For vehicle-specific service, confirm the exact application by make, model, and position before ordering FAG SS3209.

Quality Assurance

FAG designs seals using high-quality materials and application-specific specifications to meet vehicle manufacturer requirements. The SS3209 reflects that engineering approach with a Viton sealing material and a construction style suited to demanding driveline sealing conditions. Compatible with select Ford Mustang and Chevrolet Camaro differential service applications where this size and seal design are specified.