i am having same problem on mine same type truck.mine is electronic ignition box.
Most likely rotors are "out of round" and need to be either re-surfaced or replaced.
The string of a veena vibrates
The skin vibrates when you hit them.
You might have a broken motor mount or broken transmission mount. the motor mounts were replaced one year ago.
The reed on a clarinet vibrates against the mouthpiece.
There is no such thing as vibrates or non-vibrates. Vibration is a concept when dealing with sound waves. However, one may mean vertibrates and invertibrates. Vertibrates are those that have backbones and invertibrates do not.
The tightly stretched surface (membrane) of a drum vibrates.
Vocal Chords
The reed vibrates.
It's the string that vibrates when you either pluck or bow them.
You can expect your engine to vibrate some. Other than the visible vibration, is the engine running smoothly? No missing or backfires or anything like that? Excessive vibration might be due to faulty motor mounts or missing hardware at the motor mounts.
The strings.