National 240733 Steering Gear Worm Shaft Seal

Steering Gear Worm Shaft Seal for TRW Applications

National 240733 is a steering gear worm shaft seal built for steering systems that use a 0.875-inch shaft and a 1.124-inch housing bore. It uses nitrile sealing material and is sized for precise sealing in compatible Ford, Mercury, and Lincoln TRW-design steering gear applications.

Key Features

• Part number: 240733
• Steering gear worm shaft seal / oil seal design
• Inside diameter: 0.875 in. (22.230 mm)
• Outside diameter: 1.135 in. (28.830 mm)
• Thickness/width: 0.125 in. (3.180 mm)
• Housing bore: 1.124 in. (28.550 mm)
• Nitrile sealing material for steering system sealing applications
• National 240733 series: 240000

Product Details

National 240733 is engineered as a steering gear worm shaft seal for vehicles using the listed TRW design steering gear configuration. The seal dimensions are matched to the shaft and housing bore requirements, helping maintain a proper seal at the steering gear worm shaft interface. National has supplied sealing products for decades, and this part reflects that focus on dimensional accuracy and material selection for service replacement use. This part cross-references Dorman - HELP 46020 for the same application.

Compatible With 1979-1982 Ford Mustang, TRW Design; 1980-1982 Ford Fairmont, TRW Design; 1980-1982 Ford Thunderbird, TRW Design; 1979-1982 Mercury Capri, TRW Design; 1980-1982 Mercury Cougar, TRW Design; 1980-1982 Mercury Zephyr, TRW Design; 1980 Ford Pinto, TRW Design; 1980 Lincoln Versailles, TRW Design; 1980 Mercury Bobcat, TRW Design; 1980 Mercury Monarch, TRW Design. Use National 240733 when servicing steering gear sealing on these Ford, Mercury, and Lincoln applications.

What It Helps Address

• Steering gear oil seepage at the worm shaft
• Fluid loss from a worn or hardened seal
• Contamination entering the steering gear housing
• Leak-related steering performance issues
• Service replacement for deteriorated original sealing components

Installation Notes and Tips

Verify shaft diameter, housing bore, and steering gear design before installation. Clean the sealing surface and inspect the worm shaft for wear, scoring, or corrosion that could affect seal life. Confirm the vehicle uses the TRW design listed in the fitment data before ordering. For best results, compare the removed seal to National 240733 and confirm dimensions during steering gear service.

Quality Assurance

National states that its sealing products are backed by more than 75 years of sealing-solution experience and ongoing design development for modern vehicle service needs. National 240733 is built to the listed dimensional specifications for steering gear sealing applications.