For 1990-2009 cars

Cause | Correction
--- | ---
DEFINITION: The roughness or vibration occurs while driving the vehicle at various speeds.
A bent or dented propeller shaft | Replace the propeller shaft.
Under coating is on the propeller shaft | Clean the propeller shaft.
The universal joints are worn | Replace the propeller shaft assembly because universal joint is not serviceable.
The driveline vibration is at 80 km/h (50 mph) | Inspect propeller shaft for runout.