National LM29710 Manual Transmission Pinion Race

Overview of National LM29710 Manual Transmission Pinion Race

The National LM29710 is a precision-engineered manual transmission pinion race designed for reliable performance in various vehicle models including Audi, BMW, Ford, and Volkswagen. This taper bearing cup is essential for maintaining smooth gear operation and transmission longevity.

• Cup Bore Diameter: 2.5625 inches (65.0880 mm)
• Cup Length: 0.5500 inches (13.9700 mm)
• Cup Radius: 0.0460 inches (1.1680 mm)
• Part Type: Manual Transmission Pinion Race (Taper Bearing Cup)
• Compatible with multiple makes and models including Audi A3, BMW 325iX, Ford Mustang, and Volkswagen Golf

Detailed Product Description and Specifications

The LM29710 pinion race by National is a taper bearing cup designed to fit within the manual transmission assembly, providing a durable surface for the pinion bearing to operate smoothly. With a cup bore of 2.5625 inches (65.0880 mm) and a cup length of 0.5500 inches (13.9700 mm), this component ensures precise fitment and optimal bearing alignment. The cup radius of 0.0460 inches (1.1680 mm) contributes to the proper seating of the bearing, reducing wear and enhancing transmission efficiency. This part is engineered to meet OEM specifications, making it suitable for use in a wide range of vehicles such as the Audi A3, BMW 325iX, Ford Mustang, and Volkswagen Golf, among others.

Common Applications and Problem Resolution

• Restores proper bearing seating in manual transmissions
• Eliminates excessive play or noise caused by worn pinion races
• Prevents premature bearing failure and transmission damage
• Improves gear engagement smoothness and reduces vibration
• Supports transmission rebuilds and maintenance on compatible models

Installation Notes and Tips

When installing the National LM29710 pinion race, ensure the transmission housing is clean and free of debris. Use appropriate tools to press the taper bearing cup evenly into place without damaging the cup bore or radius. Verify the fitment against the vehicle’s service manual specifications, especially for models like the Ford Mustang or Volkswagen Golf. Proper lubrication of the bearing surfaces before assembly is recommended to facilitate smooth operation and reduce initial wear.

Quality Assurance and Warranty Information

National manufactures the LM29710 pinion race to meet stringent quality standards, ensuring durability and consistent performance in manual transmission systems. This part is produced with high-grade materials and precision machining to match OEM tolerances. While specific warranty details may vary, National typically offers coverage against manufacturing defects to provide confidence in the product’s reliability.