ATP Parts LO-21 Automatic Transmission Torque Converter Seal

Automatic Transmission Torque Converter Seal

ATP Parts LO-21 is an exact-fit automatic transmission torque converter seal for select Ford, Mercury, and Lincoln applications. It is built for the converter impeller hub seal location and supports a precise sealing interface in the transmission assembly.

Key Features

• Automatic transmission torque converter seal for the converter impeller hub
• Exact-fit replacement from ATP Parts
• Matches OE-style sealing dimensions for listed applications
• Cross-references National 4189H for the same application
• Part number LO-21 for easy identification

Application Details

ATP Transmission Seals and Gaskets are made as direct replacement parts for transmission sealing service. LO-21 is used on Ford Taurus, Ford Windstar, Ford Freestar, Mercury Sable, and Lincoln Continental applications where the converter impeller hub seal is specified. This part cross-references National 4189H for the same application. The LO-21 seal is also referenced under OE and aftermarket numbers including 2F1Z7F401AA and E6DZ7F401A.

What It Helps Repair

• Transmission fluid leakage at the torque converter hub
• Seepage around the converter impeller hub seal area
• Seal wear found during transmission service
• Loss of sealing integrity in the front transmission section
• Service replacement on listed Ford, Mercury, and Lincoln vehicles

Installation Notes

Verify the transmission and converter hub seal location before installation. Inspect the hub surface for wear, scoring, or contamination, and replace any damaged sealing surfaces as needed. Clean the bore and sealing area thoroughly so the new seal seats evenly. Confirm the application by year, make, model, and transmission configuration before assembly.

Quality Assurance

ATP Parts positions this seal as an exact-fit replacement for transmission sealing service, with application coverage spanning 1986-2006 model years across the listed Ford, Mercury, and Lincoln vehicles.