National LM300811 Manual Transmission Differential Race

Overview of National LM300811 Manual Transmission Differential Race

The National LM300811 is a precision-engineered manual transmission differential race designed for select Audi, Dodge, INFINITI, Maserati, Mercedes-Benz, Nissan, Porsche, Saab, and Volkswagen models. This taper bearing cup ensures reliable performance and proper fitment in manual transmission assemblies.

• Cup Bore Diameter: 2.6772 inches (68.0010 mm)
• Cup Length: 0.5315 inches (13.5000 mm)
• Cup Radius: 0.0600 inches (1.5240 mm)
• Part Type: Manual Transmission Differential Race (Taper Bearing Cup)
• Compatible with multiple vehicle makes and models including Audi 80 Quattro, Porsche 911, Volkswagen Golf, and Mercedes-Benz 300SE

Detailed Product Description

The LM300811 manual transmission differential race by National is manufactured to meet exacting specifications for taper bearing cups used in manual transmission systems. With a cup bore diameter of 2.6772 inches (68.0010 mm) and a cup length of 0.5315 inches (13.5000 mm), this component is designed to provide a precise fit and maintain proper bearing alignment. The cup radius of 0.0600 inches (1.5240 mm) supports smooth rotation and reduces wear on the differential assembly. This part is engineered for durability and consistent performance in demanding driving conditions.

Compatible Vehicles and Applications

This manual transmission differential race is compatible with a wide range of vehicles, including but not limited to:

• Audi models such as 80, 80 Quattro, 90, 90 Quattro, 100, 100 Quattro, 200, and 200 Quattro
• Dodge and INFINITI models including the 228i and 430i
• Maserati and Mercedes-Benz models like 300D, 300SD, 300SE, 380SE, 420SEL, 500SEC, and 560SEL
• Nissan models including D21, Frontier, Pathfinder, and Xterra
• Porsche models such as 911, 924, 944, 968, Boxster, and Cayman
• Saab and Volkswagen models including Beetle, Golf, Jetta, Passat, and Vanagon

Common Issues Addressed by LM300811

• Wear or damage to the manual transmission differential race causing noise or rough operation
• Improper bearing fit leading to premature transmission component failure
• Excessive play or looseness in the differential assembly
• Transmission vibration or irregular shifting due to worn bearing cups
• Replacement during manual transmission rebuilds or maintenance

Installation Notes and Tips

• Ensure the transmission is properly supported and clean before installation
• Use appropriate tools to press the taper bearing cup into place without damage
• Verify cup bore and length measurements match OEM specifications for your vehicle
• Inspect related transmission components for wear during installation
• Consult vehicle-specific service manuals for torque specifications and procedures

Quality Assurance and Warranty

National manufactures the LM300811 manual transmission differential race to meet industry standards for fit and function. Each part undergoes quality control inspections to ensure dimensional accuracy and material integrity. While specific warranty details may vary, National typically offers coverage against manufacturing defects to support reliability and customer confidence.