National 7044NA Differential Pinion Seal - Rear or Rear Outer

National 7044NA Differential Pinion Seal Overview

The National 7044NA differential pinion seal is engineered to provide reliable sealing performance for driveline applications. Designed specifically for select Ford, Lincoln, and Mercury vehicles, this oil seal helps maintain proper lubrication and prevents leaks in the differential assembly.

• Inside diameter: 1.812 inches (46.020 mm)
• Outside diameter: 3.005 inches (76.330 mm)
• Flanged outside diameter: 3.310 inches (84.074 mm)
• Thickness/width: 0.455 inches (11.560 mm)
• Material: durable nitrile rubber
• Helix type: clockwise-spiral lip design for enhanced sealing
• Housing bore diameter: 3.000 inches (76.200 mm)
• Part number: 7044NA

Technical Details and Material Specifications

This differential pinion seal from National is part of the 7000 series and features a nitrile rubber construction, which offers resistance to oil, heat, and wear. The seal’s clockwise-spiral lip design improves sealing efficiency by directing lubricant back into the housing, reducing the risk of leaks. With an inside diameter of 1.812 inches and an outside diameter of 3.005 inches, it fits precisely into the housing bore of 3.000 inches, ensuring a secure fit on the pinion shaft.

Compatible Vehicles and Applications

The 7044NA differential pinion seal is compatible with a range of Ford, Lincoln, and Mercury models, including the Ford Bronco, Mustang, F-150, and Econoline series, as well as Lincoln Continental and Mercury Cougar. This part is designed for use in the differential assembly to maintain proper oil retention and prevent contamination.

• Prevents oil leaks in the differential pinion area
• Protects against dirt and debris entering the differential
• Maintains lubrication for smooth driveline operation
• Reduces wear on pinion shaft and bearings
• Helps avoid costly differential repairs due to seal failure

Installation Notes and Tips

When installing the National 7044NA differential pinion seal, ensure the housing bore and shaft are clean and free of debris. Use appropriate tools to press the seal evenly into the bore without damaging the sealing lip. Verify the seal orientation matches the clockwise-spiral lip design to optimize sealing performance. Lubricate the seal lip lightly with gear oil before installation to reduce initial wear.

Quality Assurance and Warranty

National manufactures the 7044NA differential pinion seal to meet industry standards for durability and performance. The nitrile material and precise dimensions ensure consistent sealing under normal operating conditions. While specific warranty details may vary, National parts typically come with a limited warranty against defects in material and workmanship.