If the U-joint of your drive shaft rotates too fast or fails to rotate, then it’s a problem with your drive shaft. The cap seals of the bearings could have rust on them. Either that or the u-joint itself is not stable. You’ll need to have your drive shaft replaced because you

As it is transmitting the torque from the engine to the wheels, the drive shafts are subjected to the torsional stress and shear stress, which cause the failure 

This is usually caused by the driveshaft not being bolted down well or the unit being out of balance. Of course, if it has been smacked by a 

Vibrations and shuddering are the most common sign of a failing driveshaft. If the bushings or U-joint wear out you can experience excessive driveshaft 

If the U-joint of your drive shaft rotates too fast or fails to rotate, then it's a problem with your drive shaft. The cap seals of the bearings 

Vibrations from under the vehicle. A common symptom of a failing driveshaft is an intense shaking coming from underneath the vehicle. Worn out u-joints, couplers or carrier bearings can cause the driveshaft to vibrate. If you don't get these components serviced, it can lead to further damage to other drivetrain components.

An object experiences torsion when twisted. Torque drives rotation, and too much torque is often the main cause of shaft torsion damage. Poorly fitted couplings are common in shaft torsion issues and can cause cracks to start in the sharp corner. Other common issues caused by torsion overload include diagonal shaft cracks and bends.

Sometimes the vibration is caused by failing U-joints or bushings. Other times, it could be related to the driveshaft not being properly bolted 

The drive shaft receives support from a bearing or bushing. It works to support each section of the driveshaft by keeping them connected. The 

Now for the cause, entailing why your car vibrates, it is because of the worn-out or damaged u-joints that further cause the driveshaft to break or fail while driving. Again, you must not be relaxed with this vibration, you immediately need to visit your mechanic and get your driveshaft repaired. Failed Knuckle

6/16 · 4. Harsh Driving Conditions. Another reason why your driveshafts keep breaking could be due to your driving style or your environment. If you usually drive on rough paths with too many potholes and road bumps, your car may hit hard on a bump causing the axle or driveshaft to bend, and over time, that could lead to a break.