National 472258 Manual Transmission Output Shaft Seal - Rear or Rear Outer

Manual Transmission Output Shaft Seal for OE-Style Service

The National 472258 manual transmission output shaft seal is built for precise sealing at the transmission output shaft. It uses nitrile sealing material and a Redi-Coat finish to support a reliable seal in service applications where fluid retention matters.

With a 1.375 in. shaft diameter, 2.004 in. outside diameter, and 0.312 in. width, this seal is sized for specific manual transmission and driveline applications. National 472258 is a zero duplication part and is backed by National’s long history in sealing technology.

Key Features

• Manual transmission output shaft seal for transmission sealing service
• Nitrile sealing material for fluid resistance in automotive use
• 1.375 in. inside diameter / shaft size
• 2.004 in. outside diameter for proper housing fit
• 0.312 in. width for the specified seal profile
• Redi-Coat finish for installation support
• National 472258 part number for direct identification

Application Details

National 472258 is used where a manual transmission output shaft seal is required to retain lubricant and help maintain proper sealing at the shaft interface. It is listed as a zero duplication part and is part of National’s 470000 series. This part cross-references Gates 23033 and Four Seasons 44030 for the same application.

Vehicle fitment includes Fits 1987-1991 Ford Tempo, Rear Outer, with 4.75 (in) Ring Gear; with Spicer Axle; Fits 1987-1991 Mercury Topaz, Rear Outer, with 4.75 (in) Ring Gear; with Spicer Axle; and Fits 1963-1979 Chevrolet Corvette, Rear, with 8.75 (in) Ring Gear; with GMC Differential; Independent Rear Suspension. These applications make the National 472258 relevant for Ford Tempo, Mercury Topaz, and Chevrolet Corvette service work where the listed rear or rear outer position is specified.

What This Seal Helps Address

• Gear oil seepage at the output shaft
• Fluid loss from a worn or hardened seal
• Contamination entering the transmission through a damaged seal area
• Leak-related drivability or maintenance concerns during drivetrain service
• Replacement needs during transmission or differential-related repair work

Installation Notes and Tips

Verify shaft diameter, housing bore, and seal width before installation. The listed dimensions are 1.375 in. shaft size, 2.000 in. housing bore, and 0.312 in. width, so the seal should be matched carefully to the application. Inspect the shaft surface for wear, scoring, or corrosion before installing National 472258, and confirm the seal lip seats evenly in the bore.

For best results, clean the sealing surface and housing thoroughly before assembly. Confirm the vehicle application details, including rear outer or rear position and the axle or differential notes shown in the fitment data, before final installation.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop products for modern vehicle service needs. The 472258 seal reflects that experience with an OE-style design approach and application-specific sizing for manual transmission output shaft sealing.