National 470380V Automatic Transmission Output Shaft Seal

Overview of National 470380V Automatic Transmission Output Shaft Seal

The National 470380V automatic transmission output shaft seal is engineered for reliable sealing performance in Cadillac Eldorado and Oldsmobile Toronado models. Designed with precision dimensions and durable fluoro-elastomer material, this oil seal helps maintain transmission integrity by preventing fluid leaks.

• Inside diameter: 1.500 inches (38.100 mm)
• Outside diameter: 2.378 inches (60.400 mm)
• Thickness/width: 0.312 inches (7.920 mm)
• Housing bore: 2.375 inches (60.330 mm)
• Material: Fluoro-elastomer for enhanced chemical and heat resistance
• Redicoat surface treatment for improved durability
• Part number: 470380V, Series 470000

Detailed Product Description

This National automatic transmission output shaft seal (part number 470380V) is specifically designed to fit the output shaft of transmissions in Cadillac Eldorado and Oldsmobile Toronado vehicles. The seal features a 1.500-inch inside diameter and a 2.378-inch outside diameter, matching the shaft and housing bore dimensions precisely to ensure a tight, leak-free fit. Constructed from fluoro-elastomer, the seal offers resistance to transmission fluids, heat, and wear, which is critical for maintaining transmission performance over time. The Redicoat treatment further enhances the seal’s longevity by providing additional surface protection against corrosion and abrasion.

Common Applications and Problem Solving

• Prevents automatic transmission fluid leaks at the output shaft
• Reduces risk of transmission contamination and damage
• Helps maintain proper transmission pressure and function
• Addresses wear-related seal failures in Cadillac Eldorado and Oldsmobile Toronado models
• Replaces worn or damaged output shaft seals to restore transmission reliability

Installation Notes and Tips

• Ensure the shaft and housing bore are clean and free of debris before installation
• Use appropriate tools to avoid damaging the seal during installation
• Verify correct orientation of the seal lip to maintain proper sealing
• Check shaft and bore dimensions to confirm compatibility with part number 470380V
• Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty

National transmission seals are manufactured to meet OEM specifications for fit and function. The 470380V output shaft seal undergoes rigorous quality control to ensure dimensional accuracy and material integrity. This product includes a limited warranty against defects in materials and workmanship, providing confidence in its durability and performance for Cadillac Eldorado and Oldsmobile Toronado applications.