Timken 331107N Automatic Transmission Torque Converter Seal

Timken 331107N Torque Converter Seal

The Timken 331107N automatic transmission torque converter seal is built for Ford and Mercury rear-wheel-drive applications that use C4, C5, C6, Cruise-O-Matic, or Ford O Matic transmissions. Its H-silicone construction, reinforced outer case, and contamination-exclusion features help maintain a tight seal at the torque converter interface.

This part cross-references National 331107N for the same application.

Key Features

• H-silicone seal material for transmission sealing applications
• Outside diameter: 2.748 in. / 69.80 mm
• Shaft diameter: 2.000 in. / 50.80 mm
• Housing bore: 2.742 in. / 69.65 mm
• Width: 0.375 in. / 9.53 mm
• Seal type 33 profile
• Reinforced outer case helps resist installation damage
• Ribbed inner diameter helps seal minor spindle imperfections
• Internal contamination exclusion system helps block debris entry
• Vent holes promote lubricant flow around the seal lip to reduce heat build-up

Detailed Description

Timken 331107N is an automatic transmission torque converter seal for a wide range of Ford, Mercury, and Lincoln vehicles, including Ford Mustang, Ford F-150, Ford F-250, Ford Bronco, Mercury Cougar, and Lincoln Town Car applications listed in the fitment data. It is used in torque converter sealing locations where maintaining fluid control is critical to transmission operation. The seal’s precision design helps keep lubricant inside the transmission while limiting contaminant intrusion at the converter opening.

For buyers searching by application, this seal fits 1975-1996 Ford E-350 Econoline, 1975-1990 Ford F-150, and 1968-1979 Mercury Cougar applications listed with Cruise-O-Matic or C4/C5/C6 notes. The Timken 331107N part number is also referenced in interchange listings, making it easier to match the correct seal during transmission service.

What It Helps Address

• Transmission fluid leakage at the torque converter seal area
• Debris intrusion around the seal lip
• Wear from minor shaft or spindle imperfections
• Heat build-up at the sealing surface
• Seal damage during installation

Installation Notes and Tips

Verify the transmission family and seal dimensions before installation. Confirm the housing bore, shaft diameter, and width against the original seal and the transmission case. Clean the sealing surface thoroughly, inspect the converter snout and bore for scoring, and install the seal squarely to avoid distortion. Use the vehicle notes in the fitment data to confirm whether the application is C4, C5, C6, Cruise-O-Matic, or Ford O Matic.

Quality Assurance

Timken oil and grease seals are engineered with precision sealing geometry, reinforced construction, and contamination-control features to support dependable transmission service. The 331107N is built to the dimensional and material specifications listed above for accurate replacement selection.