Constant Velocity Joint Mechanics

Automobile industry has gone through phenomenal changes since its inception, parts like velocity joint, drive shaft and shock absorbers have been reengineered vigorously for a better performance of the vehicles.
For a better understanding of the dynamic changes occurred lets have a look at the mechanics of CV joint- constant velocity joint also known as homo-kinetic joint. Power is the key to drive the car and the way it is disseminated to the wheels. Earlier the belts, chains and other shaft systems were in use to provide the sufficient power to the vehicle, but their routine maintenance was required and was considered erratic at the same time. For angular motion a universal joint was initially used that included triplex joint coupling and steel shaft that lead to vertical movement.

The shaft asserts constant rotary motion rapidly in the CV joint, where the system allows twisting at changeable angles. This joint also continues the constant rotary motion at regular angular motion without escalating high chafing. In front wheel drive sedans, CV joint is used the most but the vehicles like Audi and Porche make use of this joint in their rear wheel drive and AWD as well.

Generally there are two kinds of constant velocity joints that are used in modern vehicles. First one allows vertical motion only that uses Triax or tri-axial joint. It comprises of a 3-tip repression to a shaft that has rollers of cylinder shape at all ends and then every end attaches to a cup having three grooves to aid the motion.

The second kind due to its socket and sphere type mechanism gives upright and horizontal movement. One of the ends has a big sphere of steel which is fixed to the shaft with a slotted cup. For a smooth cup and sphere movement each slot in the cup allows dwelling of a steel sphere. Adequate lubrication is needed in order to decrease the possible clutching and heat. CV joint grease is used as a lubricant in rubber boot of the system.

This system has a group of steel rods unified by the slotted rubber boots. The purpose of the boot is to protect the grease level to minimize friction and from all sorts of grime. These joints are sturdy to counter pressures from suspension and steering motions. It also helps in detection of speed variability which is then used by the computer to activate the ABS- anti-locking brake system in the car. It also averts skidding in case of high acceleration braking.

To identify the CV joint troubles check the boot’s wear and tear to avoid heavy repairs. Mostly it gets greased up only. The joint can last from 100,000 to 200,000 km with the exception of heavy corrosion. The problems of joints are mostly related to the vibrations at top acceleration or you can experience loud noise during turning of the vehicle.

You can identify the worn out joints when excessive clicking takes place while parking or turning the vehicle. It is better to inspect the boots to evade the arrest and take the car to a repair shop. The kit of CV joint is from $50 to $150 that depends on the model and construct of the car and the labor charges can be more than $400 for complete reinstallation of joint and shaft. You can diagnose the faulty joint when it pulls in a pattern in the suspension. It means that the rubber boot needs to be fixed with minor repair or else full reinstallation is required.

If you encounter the reinstallation problem of the constant velocity joint then it can be fixed easily from any repair shop. Once you come up with such a problem than do consult the car’s manual first. Then buy the correct kits and components with affordable prices that are involved in the replacement process.