National 710983 Differential Pinion Seal - Front Outer or Rear Outer

Overview

National 710983 is a differential pinion seal built for specific Mercedes-Benz and Sprinter applications. It uses fluoro-elastomer construction and metric dimensions to match the required shaft and housing measurements for a precise sealing interface.

Use this seal when servicing driveline leaks at the pinion area on compatible Mercedes-Benz G-Class and Sprinter differential assemblies. The 710983 part number is also useful when cross-checking replacement needs against OE-style sealing specifications.

Key Features

• Fluoro-elastomer material for sealing performance in driveline service
• Metric design with 40 mm shaft diameter and 70 mm housing bore
• Overall width with side lip measures 20 mm for application-specific fitment
• Part of National Series 710900 sealing solutions
• Fits Mercedes-Benz G550, G63 AMG, G65 AMG, G55 AMG, and G500 applications

Detailed Description

National 710983 is an oil seal used as a differential pinion seal in rear and front outer applications listed in the fitment data. It is engineered around a 1.575-inch shaft diameter, 2.764-inch outside diameter, and 0.512-inch width, with matching metric equivalents for accurate installation. The fluoro-elastomer sealing material is selected for driveline environments where consistent contact and dimensional stability matter.

This part number, 710983, covers multiple Mercedes-Benz G-Class configurations as well as Dodge and Freightliner Sprinter rear outer differential applications with the specified axle and ring gear notes. For buyers searching for a Mercedes-Benz G550 differential pinion seal or a Sprinter 2500 rear outer pinion seal, the fitment data should be matched carefully to axle configuration before installation.

National has supplied sealing products for more than 75 years, and the 710900 series reflects that focus on modern sealing applications. This part cross-references Mercedes-Benz OE numbers 0079971047 and 0079976347 for the same application.

What It Is Used For

• Stopping gear oil seepage at the differential pinion seal area
• Replacing a worn or hardened seal during differential service
• Restoring sealing integrity after axle or driveline maintenance
• Addressing fluid loss caused by seal wear or surface contamination

Installation Notes and Tips

Confirm the axle and differential notes in the fitment table before ordering or installing. Measure the shaft and housing dimensions against the listed specifications, and inspect the sealing surface for wear, scoring, or debris before assembly. Proper alignment during installation is important to avoid premature seal damage.

Quality Assurance

National backs this seal with more than 75 years of sealing product development and application coverage. The 710983 is part of a long-running sealing line built for current vehicle service requirements.