National 303 Manual Transmission Input Shaft Bearing - Outer or Rear Outer

Overview of National 303 Manual Transmission Input Shaft Bearing

The National 303 manual transmission input shaft bearing is engineered for reliable performance in select Chrysler, Dodge, and Saab vehicles. Designed as a single row radial ball bearing, it supports smooth rotational movement and helps maintain transmission efficiency.

• Single row radial design for consistent load handling
• Precision bore diameter of 0.669 inches (17.000 mm)
• Outer diameter of 1.850 inches (47.000 mm) for exact fitment
• Width of 0.551 inches (14.000 mm) ensuring proper shaft alignment
• Compatible with Chrysler, Dodge, and Saab models including 900, Dart, Imperial, Lancer, Newport, New Yorker, and Town & Country

Technical Specifications and Design Details

This National 303 bearing features a single row radial ball bearing design, optimized for manual transmission input shafts. The inner race bore measures 0.669 inches (17.000 mm) with an inner race radius of 0.040 inches (1.020 mm), providing precise seating on the shaft. The inner race width is 0.551 inches (14.000 mm), matching the outer race width to maintain uniform load distribution. The outer race outside diameter is 1.850 inches (47.000 mm), ensuring compatibility with the transmission housing. This bearing is part of the National 300 series and classified as type A-1, reflecting its specific engineering standards.

Compatible Vehicles and Applications

The National 303 manual transmission input shaft bearing is compatible with a range of Chrysler, Dodge, and Saab vehicles. It is suitable for models such as the Chrysler Imperial, New Yorker, and Town & Country, Dodge Dart and Lancer, as well as the Saab 900. This bearing is designed to replace worn or damaged input shaft bearings in manual transmissions, helping restore smooth gear engagement and reduce drivetrain noise.

• Eliminates excessive input shaft play
• Reduces transmission noise and vibration
• Prevents premature wear of transmission components
• Supports smooth gear shifting performance
• Addresses bearing failure symptoms in manual transmissions

Installation Notes and Tips

When installing the National 303 bearing, ensure the transmission input shaft and housing are clean and free of debris. Proper alignment during installation is critical to avoid premature bearing wear. Use appropriate tools to press the bearing into place without damaging the races. Verify the bearing fits securely with no excessive clearance. Lubricate according to manufacturer specifications before reassembly.

Quality Assurance and Warranty

National bearings are manufactured to meet industry standards for durability and precision. The 303 manual transmission input shaft bearing undergoes rigorous quality control to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in product reliability.