What Causes the Vibration in D Gear but Not in N Gear?
1 Answers
When in D gear, the transmission and engine are interconnected, which makes the vibration more noticeable. In N gear, the transmission and engine are disconnected, preventing engine vibrations from being transmitted to the transmission, hence the reduced vibration. Additionally, it's necessary to check if the transmission fluid needs replacement, as aged fluid can increase the likelihood of resonance noise. Common causes of D gear vibration include excessive carbon buildup, fuel system malfunctions, and aging engine mounts. Causes and Solutions for D Gear Vibration: Excessive Carbon Buildup: Severe carbon deposits in the engine cylinders can clog spark plugs and valves, leading to vibrations at idle. If acceleration performance declines and vibrations persist, the engine cylinders should be cleaned. Fuel System Malfunction: Unstable fuel pressure can cause inconsistent air-fuel mixture concentrations, resulting in vehicle vibration and unstable idle. Consider replacing the fuel filter and checking the fuel pressure before the filter. If issues persist, the fuel pump may be faulty. Aging Engine Mounts: If engine vibrations worsen without a loss of power, the engine mounts may need replacement. Solutions: Clean the engine cylinders; replace engine mounts; inspect spark plugs; check the fuel system.
