InMotion WS410308 Automatic Transmission Extension Housing Seal

Automatic Transmission Seal for Ford C5 Applications

The InMotion WS410308 is an automatic transmission extension housing seal built with nitrile sealing material for a precise fit and dependable fluid control. It is specified for Ford C5 transmission applications across multiple Ford truck and Bronco platforms, including classic F-100, F-150, F-250, F-350, and Bronco models.

With an inside diameter of 2.125 inches, an outside diameter of 3.066 inches, and a width of 0.5 inch, this seal is sized to match the housing and shaft dimensions required for the listed Ford C5 applications. The nitrile construction is selected for sealing performance in transmission environments where resistance to fluid exposure matters.

• Part number WS410308 for Ford C5 transmission service
• Nitrile sealing material for fluid-resistant performance
• Inside diameter: 2.125 in; shaft diameter: 2.125 in
• Outside diameter: 3.066 in; housing bore: 3.061 in
• Width/thickness: 0.5 in for proper housing fit
• Compatible with classic Ford truck and Bronco transmission applications

Fitment Details

• Fits 1977-1980 Ford Bronco, N/A, with Ford C5 Transmission
• Fits 1976-1980 Ford F-150, N/A, with Ford C5 Transmission
• Fits 1973-1980 Ford F-250, N/A, with Ford C5 Transmission
• Fits 1979-1980 Ford F-350, N/A, with Ford C5 Transmission
• Fits 1970-1976 Ford F-100, N/A, with Ford C5 Transmission
• Fits 1968-1974 Ford F-350, N/A, with 3-Speed Ford C5 Transmission
• Fits 1968-1972 Ford F-250, N/A, with 3-Speed Ford C5 Transmission
• Fits 1965-1969 Ford F-100, N/A, with 3-Speed Ford C5 Transmission

What This Seal Helps Address

• Transmission fluid seepage at the extension housing
• Contamination from dirt and moisture entering the sealed area
• Wear-related sealing loss in aging Ford C5 assemblies
• Service issues tied to incorrect seal dimensions
• Leak concerns during transmission maintenance or rebuild work

Installation Notes and Tips

Verify the transmission type before ordering, since this seal is listed for Ford C5 applications only. Confirm the inside diameter, outside diameter, housing bore, and width against the original seal and housing dimensions before installation. Clean the sealing surface thoroughly and inspect the housing for scoring or wear that could affect seal retention.

For best results, install WS410308 with care to avoid distorting the nitrile sealing lip. If the housing or shaft shows damage, correct those conditions before final assembly so the seal can seat properly and maintain a consistent barrier.

Quality Assurance

InMotion manufactures this seal with precision-focused construction and high-quality nitrile material for transmission sealing service. The design emphasizes a secure fit and reliable fluid control for the listed Ford C5 applications, including Ford Bronco and Ford F-Series trucks.