The Jaguar CV joint (Constant Velocity joint) is part of your Jaguar's drivetrain that helps in the efficient transmission of torque to the wheels as it is turned while the suspension moves up and down. It implements two rotating shafts to transfer power through a variable angle, at a constant rotational speed and without any increase in play or friction. It is used in front-wheel-drive and all-wheel-drive vehicles. But on some rear-wheel-drive vehicles having independent rear suspensions usually are geared with CV joints at the ends of the rear axle halfshafts. The CV joint is composed of two universal joints that are closely coupled at each other, so their acceleration-deceleration effects are able to cancel each other out.

The Jaguar CV joint has an inner and outer joint. The inner joint connects to the transmission's output shaft. It is designed with the ability to slide in and out to allow minor changes in the overall length of the shaft assembly. This is necessary in case modifications in suspension travel and ride height is needed. The main portion of the axle shaft connects to the outer CV joint. It has an inherent capacity to supply even an even and smooth torque transfer even if the wheels are steered and turned sharply. Both the inner and outer CV joint are covered via a protective boot.

The Jaguar CV joint is essentially reliable and fully functional. But due to wear and partial seizures, it tends to be inefficient. Wear in the outer joint is characterized by a vibration at certain speeds, similar to the vibration caused from an unbalanced wheel. This can easily be detected by allowing your vehicle to slowly run in tight circles, left and right. If a rhythmic clicking or cracking noise can be heard, for sure there is trouble in the outer joint. On the other hand, wear in the inner joint can cause a "clunk" or "pop" when power is applied, or in severe cases, whenever lifting off the throttle.

Partial seizure is caused by joint overheating. This may eventually result to the boot being broken, allowing the grease to leak out off the joints and dirt or moisture to invade inside. When detected right away, you can clean the joint thoroughly, repack the grease and replace the boot. But if severe damage is incurred, you will have to replace the entire joint assembly.

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