National 6879H Manual Transmission Output Shaft Seal - Front

Manual Transmission Output Shaft Seal for Chrysler and Dodge

The National 6879H manual transmission output shaft seal is built for sealing performance in classic Chrysler and Dodge applications. It uses silicone sealing material and precise dimensions to help maintain a secure seal at the transmission output shaft.

Key Features

• Part number: 6879H
• Manual transmission output shaft seal / oil seal
• Silicone sealing material for dependable sealing performance
• Inside diameter: 2.125 in. (53.980 mm)
• Outside diameter: 2.879 in. (73.130 mm)
• Width: 0.375 in. (9.530 mm)
• Housing bore: 2.875 in. (73.030 mm)
• Series 6000, Type 33

Detailed Description

National 6879H is a transmission sealing component for vehicles using Chrysler A323 and A466 automatic transmission applications listed below. The seal’s 2.125-inch shaft size, 2.879-inch outside diameter, and 0.375-inch width provide the dimensional fit needed for the output shaft area, while the silicone sealing material supports consistent oil control. This part is a direct-fit style oil seal for Chrysler 300, Imperial, Newport, Town & Country, New Yorker, Dodge Dart, and Dodge Lancer applications shown in the fitment data.

This part cross-references Bosch 68029 and Continental 60829 for the same application. National 6879H is a practical choice when servicing Chrysler A323 transmission output shaft seal and Chrysler A466 automatic transmission seal applications.

Vehicle Fitment

• Fits 1956-1961 Chrysler 300, Front — For use with Chrysler A466 automatic transmissions
• Fits 1956-1961 Chrysler Imperial, Front — For use with Chrysler A466 automatic transmissions
• Fits 1957-1961 Chrysler New Yorker, Front — For use with Chrysler A466 automatic transmissions
• Fits 1961 Chrysler Newport, Front — For use with Chrysler A466 automatic transmissions
• Fits 1957-1961 Chrysler Town & Country, Front — Fits Chrysler A466 3-speed automatic transmissions
• Fits 1960-1961 Dodge Dart, Front — For use with Chrysler A466 automatic transmissions
• Fits 1961 Dodge Lancer, Front — For use with Chrysler A466 automatic transmissions
• Fits 1957-1960 Chrysler Newport, Front — Fits Chrysler A466 3-speed automatic transmissions
• Fits 1960 Dodge Dart, Front — with Chrysler A323 Transmission
• Fits 1957-1959 Dodge Lancer, Front — Fits Chrysler A466 3-speed automatic transmissions
• Fits 1953-1956 Chrysler New Yorker, Front — with Chrysler A323 Transmission
• Fits 1953-1956 Chrysler Newport, Front — For Chrysler A323 Transmission with 2 Speed Manual Transmission Output Shaft Seal
• Fits 1953-1956 Chrysler Town & Country, Front — For Chrysler A323 Transmission with 2 Speed Manual Transmission Output Shaft Seal
• Fits 1955-1956 Dodge Lancer, Front — For Chrysler A323 Transmission with 2 Speed Manual Transmission Output Shaft Seal
• Fits 1955 Chrysler 300, Front — with Chrysler A323 Transmission
• Fits 1953-1955 Chrysler Imperial, Front — with Chrysler A323 Transmission

Installation Notes and Tips

Confirm shaft diameter, housing bore, and seal width before installation to match the transmission case and output shaft. Inspect the sealing surface for wear, scoring, or contamination before installing the new seal. Clean the bore thoroughly and seat the seal evenly to help prevent leaks at the transmission output shaft.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop sealing components for older and current vehicle platforms. The 6879H reflects that engineering focus with application-specific dimensions and material selection for Chrysler and Dodge transmission service.