National LM300849 Manual Transmission Differential Bearing

Overview of National LM300849 Manual Transmission Differential Bearing

The National LM300849 is a precision-engineered manual transmission differential bearing designed for a range of European and American vehicles. This taper bearing cone ensures reliable performance and durability in demanding transmission applications, compatible with models from Audi, Mercedes-Benz, Porsche, and more.

• Part Number: LM300849
• Brand: National
• Type: Manual Transmission Differential Bearing (Taper Bearing Cone)
• Cone Bore Diameter: 1.6142 inches (41.0010 mm)
• Cone Length: 0.7087 inches (18.0010 mm)
• Compatible with multiple makes including Audi, Dodge, INFINITI, Maserati, Mercedes-Benz, Nissan, Porsche, Saab, and Volkswagen

Technical Specifications and Attributes

This National LM300849 bearing features a cone bore diameter of 1.6142 inches (41.0010 mm), providing a precise fit for the differential assembly. The cone length measures 0.7087 inches (18.0010 mm), ensuring proper seating and load distribution within the manual transmission system. As a taper bearing cone, it is designed to handle axial and radial loads effectively, contributing to smooth differential operation.

Compatible Vehicles and Fitment Details

The LM300849 is compatible with a wide range of vehicles, including Audi models such as the 80, 80 Quattro, 90, 90 Quattro, 100, 100 Quattro, 200, and 200 Quattro. It also fits various Mercedes-Benz models like the 300D, 300SD, 300SDL, 300SE, 300SEL, 300TD, 380SE, 380SEC, 380SEL, 380SL, 380SLC, 420SEL, 500SEC, 500SEL, 560SEC, 560SEL, and 560SL. Porsche models including the 911, 924, 944, and 968 are supported, along with Volkswagen vehicles such as the Beetle, Golf, Jetta, Passat, and Vanagon. Additional fitment includes Dodge, INFINITI, Maserati, Nissan, Saab, and other select models.

Common Applications and Problem Resolution

• Replacement of worn or damaged manual transmission differential bearings
• Elimination of differential noise caused by bearing wear
• Restoration of smooth differential operation and improved drivetrain performance
• Prevention of premature transmission component failure due to bearing degradation
• Addressing issues related to improper bearing fit or clearance in manual transmissions

Installation Notes and Tips

When installing the National LM300849 bearing, ensure the cone bore and shaft surfaces are clean and free of debris. Proper lubrication is essential to prevent premature wear and to maintain bearing performance. Use appropriate tools to press the bearing cone into place without causing damage. Verify correct seating and clearance according to the vehicle manufacturer’s specifications, especially for Audi Quattro and Mercedes-Benz models where precise fitment is critical.

Quality Assurance and Warranty Information

National bearings are manufactured to meet stringent quality standards, ensuring durability and reliable performance in manual transmission applications. The LM300849 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.