MOOG Universal Joint 491 for Jeep Wrangler — Greaseable Super Strength U-joint with corrosion protection

MOOG 491 is a greaseable Super Strength universal joint engineered to replace worn U-joints on compatible Jeep Wrangler models, offering enhanced durability, corrosion protection and easy lubrication for longer service life.

Built from heavy-duty materials and validated through extensive engineering tests, the MOOG 491 Super Strength U-joint is intended for drivers who need a dependable driveline component for higher torque and horsepower applications. Its greaseable design and protective coatings are designed to extend component life under off-road and street conditions while simplifying scheduled maintenance.

Will this U-joint fit my Jeep Wrangler?

MOOG 491 is manufactured to match the dimensions and specifications for a range of Jeep Wrangler model years. Always verify fitment using your vehicle details to ensure compatibility before purchase.

• Compatibility with 2007–2012, 2013–2017, and select 2018 Jeep Wrangler models
• Check year, make, model, engine and trim for precise fit
• Refer to the seller's fitment notes and "Amazon Confirmed Fit" tool for any special qualifiers

How does the greaseable design help maintenance?

The MOOG 491 features a radial bearing cup layout that allows lubricant to reach all bearing surfaces evenly, reducing wear. A greasable fitting gives technicians and DIYers the ability to replenish grease quickly during routine service intervals.

• 360-degree lubricant distribution to all bearing surfaces
• Grease fittings for straightforward on-vehicle servicing
• Nitrile seals keep grease in and contaminants out for prolonged performance

What makes this U-joint stronger than standard replacements?

MOOG applies heat-treat and forging processes to key components so the U-joint withstands higher loads. Precision grinding and case-hardening of bearing cups plus a carburized, forged steel cross combine to resist fatigue under heavy-duty use.

• Cold-forged, case-hardened, and precision-ground bearing cups
• Forged and carburized heat-processed steel cross for superior strength
• Designed for applications with increased torque and horsepower

How does MOOG protect the joint from corrosion and dirt?

Corrosion-resistant coatings and durable seals are applied to help the U-joint resist rust and contamination when exposed to road salts, water, and debris. These measures help maintain smooth operation and reduce premature failure.

• Exclusive MICRO SHIELD coating for rust and corrosion protection
• Nitrile seals provide effective grease retention and debris exclusion
• Rigorously tested sealing and coating systems validated by MOOG engineers

Who this is for: The MOOG 491 greaseable Super Strength universal joint is suited to Jeep Wrangler owners, off-road enthusiasts and mechanics who need a robust, serviceable replacement for worn U-joints. It’s especially appropriate for vehicles exposed to heavy loads, towing, lifted suspensions, or harsh environments where corrosion resistance and the ability to re-lubricate on the vehicle extend component life and reduce downtime.