National 1173 Differential Pinion Seal - Front Outer or Rear Outer

National 1173 Differential Pinion Seal Overview

The National 1173 differential pinion seal is engineered to provide reliable sealing performance for driveline applications. Designed with precision dimensions and a clockwise-spiral lip design, this oil seal is compatible with various Nissan, Saab, and Subaru models, ensuring proper fit and function.

• Inside diameter: 1.378 inches (35.000 mm)
• Outside diameter: 2.648 inches (67.270 mm)
• Thickness: 0.472 inches (12.000 mm)
• Overall width with side lip: 0.709 inches (18.000 mm)
• Material: durable polyacrylate
• Helix type: clockwise-spiral lip design for effective sealing
• Housing bore: 2.638 inches (67.000 mm)

Technical Details and Design Features

The National 1173 differential pinion seal is constructed from polyacrylate, a material known for its resistance to heat, oil, and wear. Its precise dimensions, including a 1.378-inch inside diameter and 2.648-inch outside diameter, make it suitable for specific driveline applications. The clockwise-spiral lip design helps maintain a tight seal around the shaft, preventing oil leaks and contamination. This seal belongs to National's 1000 series, which focuses on reliable sealing solutions for automotive driveline and axle components.

Compatible Vehicles and Applications

This differential pinion seal is compatible with a range of Nissan, Saab, and Subaru vehicles. It fits models such as Nissan 200SX, 280ZX, 720, 810, Maxima, and Sentra; Saab 9-2X; and Subaru Baja, Forester, Impreza, Legacy, and Standard. The National 1173 seal is designed to replace worn or damaged seals in these vehicles’ differentials, ensuring proper oil retention and driveline performance.

Common Issues Addressed by the National 1173 Seal

• Prevents oil leaks from the differential pinion shaft
• Reduces contamination ingress into the differential housing
• Maintains proper lubrication for driveline components
• Minimizes wear on the pinion shaft and bearings
• Helps avoid costly differential repairs due to seal failure

Installation Notes and Tips

When installing the National 1173 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 housing bore without damaging the sealing lip. Verify the seal orientation matches the clockwise-spiral lip design for optimal sealing performance. It is recommended to inspect related components such as bearings and gears during installation to ensure overall driveline integrity.

Quality Assurance and Warranty

National manufactures the 1173 differential pinion seal to meet industry standards for durability and performance. The polyacrylate material and precise engineering contribute to a long service life under normal operating conditions. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.