What does a failing DMF sound like?
What does a failing DMF sound like? Clunking or Spring Noise While the Car is in Neutral Additionally, you'll find that failing DMFs tend to produce an irregular clunking noise while the car is in neutral. This type of noise is often called 'DMF death rattle' and is something you definitely don't want to hear when you start the car in the morning. What are the symptoms of a failing DMF? Somewhat ironically, and despite the fact that the primary purpose of dual mass flywheels is to reduce engine vibrations, excessive vibration that may or may not be accompanied by...