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CV joints: You should know the following

 

Constant-velocity joints, also known as CV joints, allow a drive shaft to transmit power through a variable angle, at constant rotational speed, without an appreciable increase in friction or play. They are mainly used in front wheel drive vehicles.

The CV joints are essential for transferring the torque from the transmission to the drive wheels at a stable speed. CV joints are also responsible for the up-and-down motion of the suspension. In front wheel drive vehicles, CV joints transfer the torque to the front wheels when your vehicle makes a turn.
CV joints are basically intricate ball and socket joints. Mainly, your CV joints connect the axle to the front wheels.
The inner  joints connect the driving shafts to the transmission, while the outer CV joints connects the drive shafts to the vehicle’s wheels. The CV  transfer the torque from the transmission to the drive wheels at a stable speed.

CV Joint problems
A CV joint is filled with a special lubricating grease that is sealed tight within the rubber or plastic boot. That boot is being held in place with the help of two clamps. A CV joint doesn’t need a very regular maintenance as it can last very long.
Though, most often the only problem with the CV  is when the protective boot cracks or gets damaged. Once that happened, the grease comes out and moisture and dirt get in, causing the CV joint to wear faster. Usually the outer CV- joint boots wear out first, as they have to sustain more movement than the inner ones.

Signs of a damaged CV-  boot or a worn CV 
When this special grease leaks out of a small crack or tear- that’s an ultimate early sign of the CV joint boot falling. In case that damage is bigger, you might see dark grease dabbled on the inside of the wheel rim.
If you continue driving with a damaged CV- boot, the CV  will wear out and eventually fail. The most common sign of a badly-worn outer CV joint is a clicking noise when you make a turn.

The failure of inner CV’s is rare, but one of the signs of a failed inner CV is shudder or side-to-side shake during acceleration.
If a CV joint itself is worn out, it can’t be repaired, it will have to be replaced with a new part.
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