CV joints, or Constant Velocity joints, are an essential component of a car's drivetrain that transmit power from the engine to the wheels while allowing them to turn at different angles. CV joints are found on the front-wheel drive, four-wheel drive, and all-wheel drive vehicles.

The CV joint is a flexible coupling that connects the axle to the wheel hub, and it allows the axle to move up and down as the car travels over bumps in the road. It consists of a hollow outer casing, called the CV joint housing, and an inner joint made up of a series of ball bearings or rollers. These ball bearings or rollers allow the joint to pivot, rotate, and flex as the car's suspension moves up and down, and the wheels turn left and right.

The CV joint is constantly exposed to high stresses and is subject to wear and tear over time. If the joint fails, it can cause the axle to disengage from the wheel, leading to a loss of power and control. Symptoms of a failing CV joint may include clicking or popping sounds during turns, vibrations while driving, or grease leaking from the joint.

Regular maintenance, such as lubrication and inspection, can help extend the life of the CV joints. If a CV joint needs replacement, it is typically recommended to replace the entire axle assembly rather than just the joint itself, as this can be more cost-effective and ensure optimal performance.

Find out more about suspension maintenance and repairs for your vehicle CV Joints by consulting with a Christchurch suspension professional and posting your job on Servo