CV Axle
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A constant velocity or CV axle joint allows the engine power to be transmitted from the transmission to the wheels at a variety of different angles. Almost all axles that send power to the front wheels use CV joints.
The CV joint is lubricated with heavy grease, and is covered with a CV boot. When the boot is torn, the grease leaks out and the CV joint overheats. This normally makes a loud clicking noise when the vehicle turns at low speeds. When a CV boot has been torn, replacement of the complete CV axle is usually recommended.
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