National RW-507-CR Automatic Transmission Final Drive Bearing - Rear

Overview of National RW-507-CR Automatic Transmission Final Drive Bearing

The National RW-507-CR is a precision-engineered automatic transmission final drive bearing designed for select Buick, Cadillac, Oldsmobile, and Pontiac models. This single row radial bearing ensures reliable performance in transmissions of vehicles such as the Cutlass, Eldorado, Firebird, and Grand Prix.

• Single row radial design for efficient load handling
• Inner race bore diameter of 1.378 inches (35.001 mm)
• Outer race outside diameter of 2.748 inches (69.787 mm)
• Overall width of 1.306 inches (33.172 mm)
• Compatible with multiple GM classic models including Cutlass Supreme and Toronado

Technical Specifications and Design Features

The RW-507-CR bearing features a single row radial design optimized for final drive applications in automatic transmissions. The inner race bore measures 1.378 inches (35.001 mm) with a radius of 0.112 inches (2.845 mm) and a width of 0.700 inches (17.780 mm). The outer race has an outside diameter of 2.748 inches (69.787 mm), a radius of 0.040 inches (1.016 mm), and a width of 0.660 inches (16.764 mm). The total bearing width is 1.306 inches (33.172 mm), providing a compact yet durable fit for transmission assemblies.

Compatible Vehicles and Applications

This National automatic transmission final drive bearing is compatible with a range of classic GM vehicles. It is specifically designed for use in:

• Buick Cutlass and Cutlass Supreme
• Cadillac Eldorado and Toronado
• Oldsmobile 442, LeMans, and Cutlass
• Pontiac Firebird, Grand Prix, GTO, Skylark, and Tempest

Using the RW-507-CR bearing in these models helps maintain proper transmission function and longevity.

Common Issues Addressed by the RW-507-CR Bearing

• Eliminates excessive transmission noise caused by worn final drive bearings
• Prevents premature transmission wear due to bearing failure
• Reduces vibration and improves smoothness in gear engagement
• Supports proper alignment of transmission components
• Helps avoid costly transmission rebuilds by maintaining bearing integrity

Installation Notes and Tips

When installing the National RW-507-CR bearing, ensure the transmission is clean and free of debris. Proper lubrication of the bearing surfaces is essential to prevent premature wear. Use appropriate tools to press the bearing into place without damaging the races. Verify fitment with the specific vehicle model and transmission type before installation.

Quality Assurance and Warranty Information

National bearings are manufactured to meet strict industry standards for durability and performance. The RW-507-CR is produced with high-quality materials and precision engineering to ensure reliable operation in demanding transmission environments. This bearing comes with a limited warranty against manufacturing defects, providing confidence in its long-term use.