What Causes Severe Shaking When Engaging the Forward Gear?
2 Answers
If the shaking is slight, it is a normal phenomenon because when the gear is engaged, the engine and transmission combine, and the engine is under load, so it will shake a bit more than when in neutral. Below is more related information: 1. Gear Shifting Essentials: Before upshifting, based on road and traffic conditions, smoothly press the accelerator pedal to gradually increase the vehicle speed, a process known as "powering up." When the speed is suitable for shifting to a higher gear, immediately release the accelerator pedal, press the clutch pedal, and shift the gear lever to the higher gear; then, while gradually releasing the clutch pedal, gently press the accelerator pedal to maintain smooth driving. Depending on the situation, use the same method to shift to an even higher gear. 2. Reasons for Body Shaking When Shifting Gears in a Manual Transmission Car: Manual transmission failure, manifested as follows: normal gear engagement, clear clutch engagement point, but noticeable shaking when starting at low RPM, accompanied by unstable engine speed. This is caused by excessive wear of the clutch pressure plate. The manual transmission primarily transmits power through the clutch, and the clutch pressure plate within the clutch is mainly responsible for transmitting kinetic energy. The clutch pressure plate has a limited lifespan; prolonged semi-clutch operation or the engine being under excessive load for extended periods can accelerate the wear of the pressure plate.
I've seen plenty of such issues in my life. When a car shakes violently in drive gear, nine times out of ten it's related to the engine or transmission. Typically, problems in the ignition system, such as worn spark plugs or leaking high-voltage wires, can cause unstable engine operation. On the transmission side, a worn torque converter or low fluid level can lead to poor power transfer. Additionally, loose or damaged engine mounts fail to secure the engine properly, causing the entire vehicle to shake. These components are interconnected, so when one fails, it affects others. I remember once a friend's old car shook so badly he couldn't even hold the steering wheel, and it turned out to be a burnt ignition coil. So, my advice is to start with the basics: check the spark plugs and oil level. If that doesn't help, take it to a professional repair shop to inspect the drivetrain. Don't delay too long, as it could cause more damage to the car and compromise driving safety.
