National 711033 Differential Pinion Seal - Rear Outer

Reliable Differential Pinion Seal for Select GM and Nissan Vehicles

The National 711033 differential pinion seal is engineered to provide a durable and precise seal for driveline applications. Designed specifically for vehicles like the Chevrolet Silverado 1500, GMC Sierra 1500, Cadillac Escalade, and Nissan TITAN, this oil seal helps maintain optimal differential performance by preventing fluid leaks.

• Inside diameter: 2.087 inches (53.000 mm)
• Outside diameter: 3.197 inches (81.200 mm)
• Flanged outside diameter: 3.452 inches (87.000 mm)
• Thickness: 0.610 inches (15.500 mm)
• Material: Fluoro-elastomer for enhanced chemical and temperature resistance
• Clockwise-spiral lip design for effective sealing
• Compatible housing bore: 3.189 inches (81.000 mm)

Product Details and Specifications

The National 711033 differential pinion seal is constructed from fluoro-elastomer, a material known for its resistance to heat, oil, and other automotive fluids. Its clockwise-spiral lip design ensures a tight seal around the pinion shaft, reducing the risk of leaks and contamination. With an inside diameter of 2.087 inches and an outside diameter of 3.197 inches, this seal fits precisely within the housing bore of 3.189 inches. The flanged outside diameter of 3.452 inches provides additional stability during installation and operation. The overall width, including the side lip, measures 0.748 inches (19.000 mm), balancing durability with compact design.

Compatible Vehicles and Applications

This differential pinion seal is compatible with a range of GM and Nissan models, including:

• Cadillac Escalade and Escalade ESV
• Chevrolet Express 2500, Silverado 1500, Suburban 1500, and Tahoe
• GMC Savana 2500, Sierra 1500, Yukon, Yukon XL, and Yukon XL 1500
• Nissan TITAN and TITAN XD

It is designed to maintain the integrity of the differential assembly by preventing oil leaks and contamination, which can lead to drivetrain issues.

Common Issues Addressed by the National 711033 Seal

• Prevents differential oil leaks that cause low fluid levels
• Reduces risk of contamination entering the differential housing
• Minimizes wear on pinion bearings by maintaining proper lubrication
• Helps avoid costly drivetrain repairs due to seal failure
• Maintains optimal differential performance and vehicle reliability

Installation Notes and Tips

Ensure the housing bore and pinion shaft are clean and free of debris before installation. The seal should be pressed evenly into the housing bore to avoid distortion. Use appropriate tools to avoid damaging the fluoro-elastomer material or the sealing lip. Verify the seal orientation matches the clockwise-spiral lip design for proper sealing function. Consult vehicle-specific service manuals for torque specifications and installation procedures.

Quality Assurance and Warranty

National manufactures the 711033 differential pinion seal to meet or exceed OEM specifications. The use of fluoro-elastomer material ensures durability under high temperature and chemical exposure typical in automotive differentials. While specific warranty details are not provided, National products are generally backed by quality standards consistent with professional automotive repair requirements.