What are the symptoms of transmission vibration?
1 Answers
The symptoms of transmission vibration include feeling vehicle shaking during low-speed acceleration and hearing abnormal knocking sounds. The main causes of transmission vibration are: excessive carbon deposits, dirty throttle body or air filter, spark plug failure, and aging engine components. The details are as follows: 1. Spark plug failure causing misfire: This is the most common reason for engine vibration. The problem lies in the engine ignition coil or spark plugs. If the ignition coil malfunctions or spark plugs fail to fire for some reason, the vehicle will experience shaking. Misfire is relatively easy to diagnose - if the vehicle shakes noticeably more than usual during medium-low speed operation and feels sluggish during acceleration, it can basically be determined as engine misfire. 2. Excessive carbon deposits: Too much carbon buildup inside the engine will absorb some fuel during startup, leading to an overly lean air-fuel mixture. The engine only begins normal operation after the carbon deposits become saturated with gasoline. However, when the mixture is ignited, the gasoline absorbed by carbon deposits gets sucked back into the cylinders by vacuum pressure, creating an overly rich mixture. This alternating lean-rich condition causes engine vibration. 3. Dirty throttle body or air filter: A severely dirty air filter restricts sufficient air intake into engine cylinders. The imbalanced air-fuel mixture results in insufficient engine power and vibration. A dirty throttle body may not close properly, causing an overly lean mixture during idle and consequent power loss. 4. Aging engine components: If the engine doesn't vibrate or vibrates only slightly when the hood is opened, the problem isn't the engine itself but worn-out buffer components. Commonly, aged engine mounts fail to provide proper cushioning. Timely replacement is necessary after identifying the faulty parts.
