What Causes Vibration in D Gear but Not in N Gear When Braking?
2 Answers
D gear shifting to N gear vibration is caused by a dirty throttle, faulty spark plugs, or brake disc issues. Dirty throttle: When carbon deposits or other contaminants adhere to the throttle, it disrupts the balance between the air intake and fuel injection, leading to insufficient fuel supply during engine operation and resulting in vehicle vibration. Cleaning the throttle can resolve this issue. Faulty spark plugs: When the vehicle vibrates intensely, it is often due to spark plug problems. Check if any spark plug in a cylinder is damaged. Replacing the spark plugs can solve the problem. Brake pad issues: When brake pads are significantly worn, you may experience reduced braking effectiveness, vehicle vibration, and abnormal noises from the wheels during braking. Replacing the brake pads can resolve this. Shifting techniques: Shift quickly, control the starting gear, keep your eyes on the road while shifting, shift sequentially, and shift smoothly. Shifting precautions: Do not look down during shifting, always pay attention to road conditions, fully depress the clutch when shifting, do not skip gears, and avoid staying in first gear all the time.
I've encountered a similar situation before. When braking in D gear, the car shakes like a sieve, but it becomes quiet when shifted to N gear. This is usually due to worn engine mounts. Engine mounts are rubber components that cushion engine vibrations. When they age or get damaged, especially when the engine is under heavy load in D gear, the shaking becomes more noticeable. In N gear, with the engine idling under less pressure, there's no shaking. Another possible cause could be an issue with the transmission's torque converter, which is responsible for transferring power but may slip when worn, leading to unstable braking. It's recommended to first check the engine mounts. Feel the engine's position with your hand—if it wobbles significantly, that's likely the culprit. Transmission inspection is a bit more complex, involving checking the fluid level and the condition of the torque converter. Delaying repairs can affect other components, so it's best to get it fixed at a repair shop sooner rather than later—safety first.
