Yukon 4340 Chromoly Super Joint Kit (pair), Dana 44, 72-77 Ford Bronco SKU: 8786

Early Bronco Dana 44 Yukon 4340 Chromoly Super Joint Kit: 4340 Forged

Upgrade your 1971-77 Ford Bronco with these Dana 44 Yukon 4340  Chromoly Super Joint Kit , designed for use with upgraded chromoly axles (not compatible with stock axles). Made from 4340 forged material, these U-joints offer a significant strength boost—about 25% more than OEM joints—and an even greater 72% strength increase thanks to their larger trunnion size. They are engineered to withstand the rigors of extreme off-roading, eliminating common issues like needle-bearing disintegration and lock-up.

These U-joints feature a unique design that eliminates the need for bearings or bushings, preventing galling from metal-to-metal contact. Each cap and trunnion has its own 300 PSI-pressurized grease reservoir, keeping out water and debris during harsh conditions like water crossings or deep mud. The high-temp copper and graphite grease withstands extreme loads of up to 200,000 psi and temperatures up to 2000°F, ensuring reliable performance under the most demanding conditions.

• Fitment: Fits 1971-77 Ford Bronco with upgraded chromoly axles (will not fit stock axle)

• Material: 4340 forged steel for 25% strength increase over OEM

• Trunnion Size: 72% stronger with no needle bearings to disintegrate or lock up

• Design: Ionically bonded coatings to prevent metal-to-metal contact

• Grease System: Each cap has a 300 PSI-pressurized grease reservoir to keep out water and debris

• Durability: High-temp copper & graphite grease handles up to 200,000 psi and 2000°F

• Retention: Full circle snap rings prevent caps from working out of axle cups

For Bronco owners seeking superior strength and performance, these Yukon 4340 Chromoly Super Joints are the perfect upgrade to keep your rig running smoothly, even in the toughest conditions.