If you have a four wheel drive car, then you know what a constant velocity joint is. That’s because all 4WD cars have CV joints on both ends of the drive shafts. The inner part of the joint connects shafts to the transmission. Then the outer part connects the drive shafts to all the wheels. Their work is to transfer torque from the transmission all the way to the wheels at a constant speed. This it does, while accommodating the regular up and down motion of your car’s suspension. In a four wheel drive car, the CV joints deliver torque to front wheels.
It is important to note that there are two main types of CV joints. The tripod type and the ball type CV joints. Ball type CV joints are used on the outer side of the drive shaft in front wheel drive cars while tripod type CV joints are used on the outer side. Like most other car parts however, CV joints experience problems, some of which often turn out too costly as far as repairs are concerned. Such problems include.
Cracked Protective Boot
CV joints hardly need repair and maintenance, unless one has rogue driving habits. The joint is usually packed with special joint, then sealed with plastic or rubber booth held firmly in place with two clamps. That explains why it is not strange to see a car driven over 200,000 or even 400,000 miles with the original CV joint still in place. Even then, the protective boot sometimes cracks or gets damaged on its own. The grease then spills out and dirty and moisture gets into the joints. This causes the joints to wear out faster and eventually fail due to corrosion and lack of lubrication.
Broken CV boot
Grease oozing out of torn part or small creak is the most common sign of a failing CV joint. You will see grease splattered on the inner part of the wheel rim if the problem is bigger. The grease can also be seen around the area inside the drive wheel. Another common sign of a broken CV boot is a popping r clicking sound each time you make a turn. The noise will get louder as you accelerate around corners. This will make your Porsche undrivable. The CV joint will eventually fail if one drives the car without fixing the problem.
Broken Inner CV Joints
Though this is a rare problem, it happens. One of its main symptoms is side to side shakes during accelerating or an uncomfortable shudder. The worn out inner joint may also cause some clunking especially when shifting gears from drive to reverse.
The Cost Of Repair
Porsche is a tough model, with CV joints that hardly ever get damaged or fail. In the unlikely event that yours fails all you will need to do is replace the boot and repack the joint with fresh CV joint grease. This is cheaper than replacing the whole drive shaft or the whole Porsche CV joint. In a nutshell, you will most likely spend less than $400 on the repair.