Timken 3404 Automatic Transmission Torque Converter Seal

Reliable Automatic Transmission Torque Converter Seal

The Timken 3404 automatic transmission torque converter seal is engineered for precise fit and durability. Designed specifically for Ford, Lincoln, and Mercury vehicles, this seal ensures optimal transmission performance by maintaining a secure seal around the torque converter shaft.

• Constructed from high-quality H-silicone material for enhanced resistance to heat and wear
• Outside diameter measures 2.751 inches (69.88 mm) for accurate housing bore fitment
• Shaft diameter of 1.996 inches (50.70 mm) ensures proper sealing on the torque converter shaft
• Housing bore dimension of 2.743 inches (69.67 mm) for precise installation
• Width of 0.325 inches (8.26 mm) provides a tight seal to prevent fluid leaks
• Clockwise (CW) helix type design for effective sealing under rotational forces
• Seal type 75 compatible with a range of automatic transmission systems

Detailed Product Description

The Timken 3404 torque converter seal is manufactured using H-silicone, a material known for its excellent thermal stability and resistance to transmission fluids. This seal is designed to fit a variety of Ford, Lincoln, and Mercury models including the Bronco, Mustang, Explorer, F-150, Crown Victoria, and more. Its precise dimensions—2.751 inches outside diameter and 1.996 inches shaft diameter—ensure a snug fit that prevents leaks and maintains transmission integrity. The clockwise helix design helps maintain sealing efficiency during torque converter rotation, reducing the risk of fluid loss and potential transmission damage.

Compatible Vehicles and Applications

• Ford Bronco, Mustang, Explorer, F-150, F-250, F-350, Excursion, Expedition
• Lincoln Navigator, Mountaineer, Continental
• Mercury Cougar, Grand Marquis
• Ford E-Series Vans: E-150, E-250, E-350 Econoline and Club Wagon variants

Common Issues Addressed by This Seal

• Prevents automatic transmission fluid leaks around the torque converter shaft
• Reduces risk of transmission overheating due to fluid loss
• Eliminates contamination entry into the transmission system
• Maintains proper hydraulic pressure within the transmission
• Helps avoid premature transmission wear and costly repairs

Installation Notes and Tips

• Ensure the transmission and torque converter surfaces are clean and free of debris before installation
• Use appropriate tools to avoid damaging the seal during installation
• Verify the seal orientation matches the clockwise helix design for proper function
• Check housing bore and shaft dimensions to confirm compatibility with the Timken 3404 seal
• Consult vehicle service manual for torque specifications and installation procedures

Quality Assurance and Warranty

Timken manufactures the 3404 torque converter seal to meet strict quality standards, ensuring reliable performance in demanding transmission applications. The use of H-silicone material provides durability under high temperature and pressure conditions. While specific warranty details may vary, Timken products typically come with a limited warranty against manufacturing defects. Refer to Timken documentation for complete warranty information.