MOOG Universal Joint Greaseable Premium U-Joint Combination 331 x 534G — OE Fit, Serviceable

MOOG 447 is a greaseable premium universal joint engineered to replace Combination 331 x 534G with durable, serviceable construction for dependable drivetrain performance.

This MOOG universal joint combines hardened materials, a greaseable seal design and factory-level testing so you can replace a worn U-joint with confidence. It’s built to match OE fit and function and to simplify maintenance with a zerk fitting that allows fresh grease to flush contaminants away. Below we answer the most common buyer questions about fit, durability, installation and maintenance so you can decide if this U-joint is the right match for your vehicle.

How do I confirm this MOOG U-joint fits my vehicle?

Before ordering, verify the Combination 331 x 534G specification matches your original U-joint size. Use the vehicle lookup tool where available and compare part dimensions and compatibility notes to your year, make, model and engine to avoid returns.

• Check the "Amazon Confirmed Fit" or seller fitment table for exact matches.
• Compare the Combination 331 x 534G sizing to the removed joint.
• Review any qualifier notes shown with an information icon for special fit guidance.

What materials and construction make this joint long-lasting?

MOOG 447 uses cold-forged, case-hardened and precision-ground bearing cups paired with a forged and carburized cross for improved strength under load. These processes increase wear resistance and provide consistent tolerances for smoother operation over time.

• Bearing cups: cold-forged and precision-ground for dimensional accuracy.
• Steel cross: forged and heat-processed for toughness.
• Nitrile rubber seals: compressed double-lip design to keep grit and moisture out.

Why choose a greaseable U-joint and how does maintenance work?

A greaseable design lets you inject fresh lubricant through a zerk fitting, which helps purge debris and moisture that shorten service life. Routine greasing extends the joint’s life and can delay replacement when performed at recommended intervals or during other drivetrain service.

• Zerk fitting allows periodic lubrication without disassembly.
• Greasing helps flush out contaminants and protect seals.
• Simple maintenance can prevent premature wear and vibration issues.

What should I expect during installation and fitment details?

MOOG designs its premium joints to install with standard tools and procedures; however, press tools or a vise are commonly needed to remove and install bearing cups cleanly. Follow factory torque specs and inspect yokes and splines for wear before installing the new joint.

• Standard U-joint replacement process applies; press or vise recommended.
• Inspect mating surfaces and seals before assembly.
• Use proper torque values and verify free movement after installation.

Who is this for? This MOOG 447 greaseable universal joint is aimed at DIY mechanics, professional technicians and fleet maintenance teams who need a durable, serviceable replacement for Combination 331 x 534G applications. If you want an OE-style fit, the ability to re-lubricate for extended life and confident materials testing behind the part, this U-joint is a practical choice.