Universal Joint

Universal Joint

Also called a U-joint, the universal joint is a flexible coupling found on the driveshaft of rear-wheel and four-wheel-drive vehicles. It allows the driveshaft to flex as the suspension moves, ensuring smooth power delivery to the wheels. A worn U-joint can cause clunking, squeaking, or vibrations while driving—especially when accelerating or shifting into gear. If not replaced, a broken U-joint can cause the driveshaft to disconnect entirely.

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