MOOG Greaseable Super Strength U-Joint 377 for Jeep Wrangler — Heavy-Duty, Re-lubricable

MOOG 377 Greaseable Super Strength universal joint is a heavy-duty, serviceable replacement designed to restore reliable driveline performance in compatible Jeep, Dodge and select pickup applications.

Designed and tested by MOOG engineers, this Super Strength® U-joint uses premium materials and a greasable construction to handle higher torque loads while resisting corrosion and contamination. Its radial-bearing cups and nitrile seals let you re-lubricate the joint for extended service life, and MOOG’s MICRO SHIELD® coating helps keep rust at bay. If your vehicle shows driveline vibration, noise, or a worn U-joint, this part is built for straightforward installation and long-term durability.

How does this U-joint improve driveline reliability?

The MOOG 377 is engineered for strength and endurance: its steel cross is forged and heat-treated while the bearing cups are cold-forged, case-hardened, and precision ground. These manufacturing steps reduce wear and resist deformation under load, which translates to steadier power transfer and longer component life.

• Forged, carburized and heat-processed steel cross for high-load strength
• Cold-forged, case-hardened bearing cups for wear resistance
• Precision grinding reduces friction and vibration

What maintenance and protection features does the MOOG 377 include?

This U-joint is greasable and fitted with radial-bearing cups to distribute lubricant evenly to all bearing surfaces, enabling routine re-lubrication. Nitrile seals retain grease and block dirt, while MOOG’s MICRO SHIELD® coating adds extra corrosion protection for under-vehicle exposure.

• Grease fitting with 360° radial lubrication distribution
• Nitrile seals for grease retention and debris exclusion
• MICRO SHIELD® corrosion-resistant coating

Will this part fit my vehicle, and how do I confirm compatibility?

MOOG provides broad coverage across domestic and select foreign nameplates, but fitment varies by year, model, engine and trim. Always use the vehicle lookup or the “Amazon Confirmed Fit” tool to verify compatibility; check any product notes indicated by an information icon for exceptions.

• Check year, make, model, engine and trim before ordering
• Use the fitment tool and review qualifier notes where applicable
• Contact seller or reference OEM specs if unsure about fit

How easy is installation, and what should I expect?

MOOG parts are engineered for straightforward, hassle-reducing installation; this U-joint is designed to replace worn universal joints with common tools and standard press or driver methods. Expect improved driveline smoothness after correct installation and proper lubrication.

• Serviceable greasable fitting simplifies post-install maintenance
• Standard press or driver installation—no special adapters required for most applications
• Follow torque and fitment specifications for safe operation

Who is this for: The MOOG 377 Greaseable Super Strength U-joint is aimed at DIY mechanics, shop technicians and fleet owners who need a robust, serviceable replacement for worn universal joints on compatible Jeep, Dodge and pickup applications. If you prioritize durability, the ability to re-grease in service, and added corrosion protection for an under-vehicle part, this MOOG U-joint is a solid choice.