National LM102949 Manual Transmission Countershaft Bearing

Overview of National LM102949 Manual Transmission Countershaft Bearing

The National LM102949 is a precision-engineered manual transmission countershaft bearing designed for reliable performance in a variety of vehicles. This taper bearing cone is compatible with multiple makes and models, including Chevrolet Silverado 1500, Ford F-150, Jeep Cherokee, and Toyota 4Runner, ensuring proper fitment and durability.

• Cone bore diameter: 1.7812 inches (45.2420 mm)
• Cone length: 0.7800 inches (19.8120 mm)
• Cone radius: 0.1400 inches (3.5560 mm)
• Part type: Taper bearing cone for manual transmission countershaft
• Compatible with a wide range of trucks, SUVs, and passenger vehicles

Technical Specifications and Features

The LM102949 bearing cone features a cone bore measuring 1.7812 inches (45.2420 mm), providing a precise fit for the countershaft assembly. Its cone length of 0.7800 inches (19.8120 mm) and cone radius of 0.1400 inches (3.5560 mm) are designed to maintain optimal bearing contact and load distribution within the manual transmission system. This taper bearing cone is engineered to withstand the stresses of manual transmission operation, contributing to smooth gear engagement and extended transmission life.

Compatible Vehicles and Applications

This National manual transmission countershaft bearing is compatible with a broad range of vehicles, including Chevrolet Silverado 1500, Ford F-150, Jeep Cherokee, Toyota 4Runner, and other models from Chrysler, Dodge, GMC, Kia, Land Rover, Lexus, Lincoln, Mazda, Mercury, Mitsubishi, Pontiac, Ram, and more. The LM102949 part number ensures correct fitment for manual transmissions requiring this specific taper bearing cone.

Common Issues Addressed by LM102949 Bearing Cone

• Excessive transmission noise due to worn or damaged countershaft bearings
• Gear slippage or difficulty shifting caused by bearing failure
• Premature transmission wear from improper bearing fit or degradation
• Vibration and rough operation linked to bearing misalignment
• Transmission overheating resulting from increased friction in bearing surfaces

Installation Notes and Tips

When installing the National LM102949 manual transmission countershaft bearing, ensure the transmission is clean and free of debris. Proper lubrication of the bearing surfaces is critical to prevent premature wear. Use appropriate tools to press the bearing cone onto the countershaft without causing damage. Verify the cone bore and length measurements match the transmission specifications for a secure fit. It is recommended to inspect related transmission components during installation to address any additional wear or damage.

Quality Assurance and Warranty

National bearings are manufactured to meet strict quality standards, ensuring durability and reliable performance in manual transmission applications. The LM102949 part undergoes rigorous testing to comply with OEM specifications. While specific warranty details may vary, National typically offers coverage against manufacturing defects, providing confidence in the product's longevity and function.