2. Rough Shifting or Jerking Transmission. A car that is experiencing rough shifting may have trouble accelerating, struggle to change gears, or lack a smooth transition. Rough shifting is often described as a clunk or a thud feeling when the vehicle shifts from one gear to the next.

What causes a transmission to jerk?

Automatic transmissions that shift hard, jerk or shake during a shift change may mean your transmission fluid needs changed or fluid level is low. In manual transmission vehicles, abnormal gear shifts could indicate damaged gear synchros, worn clutches or other, more severe issues.

What does a jerking transmission feel like?

It might feel like a jerk, clunk or thud. This is usually caused by troubles with the vacuum, transmission fluid or a faulty sensor.