What does the cv joint on a car do?

A constant velocity (CV) joint is a mechanical device that allows the transmission of torque between two shafts that are not aligned. This is important in cars because the wheels of a car are not always in line with the transmission, due to the suspension system. CV joints allow the wheels to turn smoothly and evenly, even when the car is going over bumps or potholes.

CV joints are typically found on front-wheel drive cars, but they can also be found on rear-wheel drive cars with independent rear suspensions. They consist of an inner race, an outer race, and a ball bearing cage. The inner race is connected to the transmission, while the outer race is connected to the wheel. The ball bearing cage holds the ball bearings in place, and allows them to rotate smoothly.

When the car is in motion, the transmission turns the inner race of the CV joint. This causes the ball bearings to roll around the cage, which in turn causes the outer race to rotate. This rotation is then transferred to the wheel, which causes the car to move.

CV joints are very important for the smooth operation of a car. Without them, the wheels would not be able to turn smoothly, and the car would be difficult to control. CV joints are also relatively maintenance-free, and typically only need to be replaced if they are damaged or worn out.