National 711140 Transfer Case Input Shaft Seal - Left

Overview

National 711140 is a premium transfer case input shaft seal built for vehicles that need reliable sealing at the transfer case input shaft. It uses FEPM (Aflas-type elastomer) sealing material and precise dimensions to support a secure fit in the housing bore.

Compatible With Ford, Lincoln, and Mercury applications, this seal is listed for left-side fitment across a wide range of models. The National 711140 part number is also referenced by 7E5Z7H469C and 7E537H469CA for the same application.

Key Features

• Premium transfer case input shaft seal for sealing the input shaft area
• FEPM (Aflas-type elastomer) material for demanding sealing applications
• Precise inside and outside diameter dimensions for proper housing fit
• Helix-style design with a single-rim shape
• National 711140 identification for easy parts lookup

Detailed Description

National 711140 is engineered as a transfer case input shaft seal with a 52 mm inside diameter, 68.27 mm outside diameter, and 8.00 mm width. The FEPM sealing material is selected for premium sealing performance, while the listed shaft and housing bore dimensions help support accurate installation in the intended transfer case application. This seal is used on Ford Edge, Ford Explorer, Ford Flex, Ford Taurus, Ford Fusion, Lincoln MKX, Lincoln MKT, Lincoln MKS, Lincoln MKZ, Lincoln Continental, and related Mercury applications where the left-side fitment is specified.

For shoppers searching for a transfer case input shaft seal for Ford Explorer or Ford Edge applications, National 711140 provides a direct replacement option with application-specific sizing. It is also a relevant choice for Lincoln MKX and Ford Taurus transfer case service where the same part number is called out.

Common Uses

• Replacing a leaking transfer case input shaft seal
• Addressing fluid seepage around the transfer case input area
• Restoring sealing performance after seal wear or hardening
• Servicing transfer case components during drivetrain maintenance

Installation Notes

Verify the transfer case application, left-side position, and shaft and housing dimensions before installation. Clean the sealing surface thoroughly and inspect the shaft for wear or scoring that could affect seal life. Confirm the part number 711140 against the vehicle listing before assembly.

Quality Assurance

National has supplied premium sealing solutions for more than 75 years and is recognized for sealing products used in modern vehicle applications. The 711140 seal reflects that focus on application-specific design and dimensional accuracy.