National 712551 Manual Transmission Output Shaft Seal - Left or Right

Overview of National 712551 Manual Transmission Output Shaft Seal

The National 712551 manual transmission output shaft seal is engineered to provide reliable sealing performance for a range of vehicles including Acura, Honda, Toyota, and Lexus models. Designed with durable nitrile material, this oil seal helps maintain transmission integrity by preventing fluid leaks and contamination.

• Inside diameter: 1.575 inches (40.000 mm)
• Outside diameter: 2.215 inches (56.260 mm)
• Thickness/width: 0.394 inches (10.000 mm)
• Sealing material: Nitrile for enhanced resistance to oil and heat
• Compatible with multiple makes and models including Honda Accord, Toyota Camry, Acura MDX, and more

Technical Specifications and Material Details

This National 712551 output shaft seal belongs to the 712000 series and is constructed from nitrile, a synthetic rubber known for its excellent resistance to petroleum-based oils and high temperatures. The seal features a precise inside diameter of 1.575 inches (40 mm) and an outside diameter of 2.215 inches (56.26 mm), with a thickness of 0.394 inches (10 mm). The housing bore size is 2.205 inches (56 mm), ensuring a secure fit within the manual transmission assembly.

Compatible Vehicles and Applications

This manual transmission output shaft seal is compatible with a variety of vehicles, including but not limited to:

• Acura models such as ILX, MDX, RL, RSX, TL, and TSX
• Honda models including Accord, Accord Crosstour, CR-V, Element, Odyssey, Pilot, and Ridgeline
• Toyota models like Avalon, Camry, Highlander, RAV4, Sienna, Solara, and Venza
• Lexus ES250, ES300, ES300h, ES330, ES350, HS250h, NX200t, NX300, NX300h, RX330, RX350, RX400h
• Dodge 3000GT, Mitsubishi Stealth, Saturn Vue, and Scion tC

Common Issues Addressed by the 712551 Output Shaft Seal

• Prevents manual transmission fluid leaks that can cause low fluid levels and transmission damage
• Protects transmission internals from dirt and contaminants
• Reduces risk of premature wear on output shaft bearings and gears
• Maintains proper lubrication within the transmission system
• Helps avoid costly transmission repairs due to seal failure

Installation Notes and Tips

• Ensure the transmission output shaft and housing bore are clean and free of debris before installation
• Use appropriate tools to press the seal evenly into the housing bore without damaging the sealing lip
• Verify the seal orientation matches the original part to maintain proper sealing function
• Check shaft surface for wear or damage that could compromise the seal
• Consult vehicle-specific service manuals for torque specifications and installation procedures

Quality Assurance and Warranty Information

National manufactures the 712551 output shaft seal to meet industry standards for durability and performance. The nitrile material provides reliable resistance to oil and heat exposure commonly found in manual transmissions. While specific warranty details may vary, National products typically come with a limited warranty against defects in material and workmanship. Always verify warranty terms with the product documentation or supplier.