National 25520 Manual Transmission Output Shaft Race - Front Inner or Rear

Overview of National 25520 Manual Transmission Output Shaft Race

The National 25520 manual transmission output shaft race is a precision-engineered taper bearing cup designed for reliable performance in various manual transmission systems. Compatible with a wide range of vehicles including Ford Mustang, Chevrolet Camaro, and Dodge Challenger, this component ensures proper bearing fitment and smooth transmission operation.

• Cup Bore Diameter: 3.2650 inches (82.9310 mm)
• Cup Length: 0.7500 inches (19.0500 mm)
• Cup Radius: 0.0310 inches (0.7870 mm)
• Part Type: Taper bearing cup
• Part Number: 25520

Detailed Product Description and Specifications

The National 25520 output shaft race is manufactured to precise dimensions, including a cup bore of 3.2650 inches (82.9310 mm) and a cup length of 0.7500 inches (19.0500 mm). The taper bearing cup design supports the output shaft by providing a smooth surface for the bearing to seat, reducing wear and maintaining transmission integrity. The cup radius of 0.0310 inches (0.7870 mm) is critical for proper bearing alignment and load distribution. This part is engineered to meet OEM specifications for manual transmission components, ensuring compatibility and durability.

Compatible Vehicles and Applications

This manual transmission output shaft race is compatible with a variety of makes and models, including but not limited to:

• Ford Mustang and F-100
• Chevrolet Camaro, Corvette, and Firebird
• Dodge Challenger and Ram 1500 series
• Cadillac CTS and Buick LeSabre
• Aston Martin DB7 and Vanquish

It is suitable for manual transmission systems requiring a taper bearing cup with the specified dimensions, making it a reliable replacement part for maintenance or repair.

Common Issues Addressed by Part Number 25520

• Excessive bearing play causing transmission noise
• Premature bearing wear due to improper seating
• Transmission output shaft misalignment
• Vibration or rough shifting in manual transmissions
• Leakage or damage from worn bearing surfaces

Installation Notes and Tips

• Ensure the transmission output shaft and housing are clean before installation
• Use proper tools to press the taper bearing cup into place without damage
• Verify cup bore and length dimensions match OEM specifications
• Check bearing fit and alignment after installation to prevent premature wear
• Consult vehicle-specific service manuals for torque and assembly procedures

Quality Assurance and Warranty Information

National manufactures the 25520 output shaft race to meet stringent quality standards, ensuring dimensional accuracy and material integrity. While specific warranty details may vary, National parts typically come with a limited warranty against defects in material and workmanship. This part is designed to provide consistent performance in manual transmission applications across multiple vehicle makes and models.