What Causes Severe Shaking When Stopping in D Gear on a Mondeo?
2 Answers
Significant continuous shaking in D gear that immediately improves when shifting to N gear may be related to aging shock absorption rubber. Specific causes: This could be due to interference between the engine, transmission, exhaust pipe, and the underbody or chassis, or aging, cracked shock absorption rubber, which transmits the engine's normal vibrations directly into the cabin. Common issues include insufficient clearance between the engine's lower part and the underbody, where neutral gear maintains some gap, but shifting to D gear causes engine displacement and direct contact with the underbody. Other causes include aging or cracked engine shock absorption rubber, deformed exhaust pipes, or aging exhaust pipe hanger rubber. Solutions: Typically, such issues can be resolved by prying open a certain part of the engine or exhaust pipe, which immediately eliminates the shaking.
Having driven a Mondeo for many years, severe shaking in D gear when parking is quite common. The most frequent cause is aging or damage to the engine mounts. These mounts act as the engine's buffer pads, and when they wear out or loosen, vibrations are transmitted into the car. Another possibility is a fault in the ignition system, such as excessive carbon buildup on the spark plugs or loose coils, leading to uneven engine operation, especially noticeable during idle when parked. Dirty transmission fluid or issues with the valve body can also easily cause shaking because the power is still connected in D gear. It's advisable to first check the mounts and spark plugs; simple replacements can often solve the problem, preventing the need for major repairs. Regular maintenance can prevent such issues, such as replacing the mount bushings every 50,000 kilometers.
