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Q: Clunking noise when put into gear, rough shifiting

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Each time I put the car in gear, I can hear a clunking sound. The shifting is rough. The fluid looks fine and is at a proper level. What could be the problem? What might be making the clunking noise?

A: Hey there. Thanks for writing in about your...

Hey there. Thanks for writing in about your 1992 Mercedes-Benz 300D. This sounds like the differential bushings could be worn. I would also check for vacuum leaks. There is a component called a vacuum switchover valve that helps to control shifting activities that could be faulty as well. An in person diagnosis will be needed to pinpoint with the fault. If you need to have this looked at, a certified professional from YourMechanic can come to your car's location to inspect the rough shifting problem and help you with a repair.

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