Timken 6930 Differential Pinion Seal - Rear or Rear Outer

Timken 6930 Differential Pinion Seal

The Timken 6930 differential pinion seal is built for rear axle sealing where lubricant retention and contamination control matter. It is a direct-fit style seal for select Ford and Mercury applications, including Mercury Colony Park, Mercury Marquis, Mercury Marauder, and 1957-1958 Ford Thunderbird rear differential service.

Key Features

• Precision sealing design helps keep gear oil inside the axle assembly and blocks dirt and debris from entering.
• Reinforced outer case helps resist installation damage and improves seal durability.
• Ribbed rubber inner diameter helps seal minor spindle imperfections and supports positive seating.
• Internal contamination exclusion system helps reduce debris penetration that can lead to leakage.
• Vent holes promote lubricant flow around the seal lip to help manage heat buildup.
• Compatible with rear applications listed for 8.75 inch ring gear and 9 in. ring gear configurations where specified.

Detailed Description

Timken 6930 is a differential pinion seal designed for rear driveline sealing service on classic Ford and Mercury vehicles. It is used in applications such as 1957-1961 Mercury Colony Park, 1967-1971 Mercury Marquis, 1963-1966 Mercury Marauder, 1969-1970 Mercury Marauder, and 1957-1958 Ford Thunderbird rear differential service. This seal supports lubricant control at the pinion area, helping maintain proper axle lubrication while limiting contamination at the seal lip.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Rear differential gear oil leakage at the pinion seal area
• Contamination entering the axle housing through a worn seal
• Seal damage caused during installation on older housings
• Leakage related to minor surface imperfections at the spindle or sealing surface
• Heat-related seal wear from poor lubricant circulation around the lip

Installation Notes and Tips

Inspect the pinion yoke, sealing surface, and surrounding housing before installation. Clean the bore thoroughly and verify the seal orientation before pressing it into place. For best results, confirm axle and ring gear configuration against the vehicle listing, especially on Mercury Colony Park and Ford Thunderbird rear differential applications.

Quality Assurance

Timken oil and grease seals use precision sealing designs and reinforced construction to support dependable driveline service. The 6930 part number is engineered for the listed rear differential applications and follows Timken’s sealing design approach for lubricant retention and contamination exclusion.