A truck operator reports a clunk noise when accelerating from a stop. Technician A says to inspect the U-joints for excessive wear. Technician B says to check for loose driveshaft yokes. Who is right?

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TheoryPractice · Accepted Answer

Both Technician A and B. Both technicians are correct. Worn U-joints can create clunking noises during acceleration as the slack in the worn joint is taken up. Similarly, loose driveshaft yokes will allow movement that results in a clunk sound when power is applied.

A truck operator reports a clunk noise when accelerating from a stop. Technician A says to inspect the U-joints for excessive wear. Technician B says to check for loose driveshaft yokes. Who is right?

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