What is a CV joint in a car?

[JacksonMarie]

Automotive CV joints are divided into inner CV joints and outer CV joints, also known as "constant velocity universal joints". They are crucial components in a car's drivetrain system, responsible for transmitting the engine's power from the transmission to the two front wheels, enabling the vehicle to drive at high speeds. A typical automotive CV joint consists of the following parts: bell-shaped housing, tripod bearing or steel balls, dust cover, retaining ring, and grease. The main inspection points for CV joints include: 1. Internal and external spline dimensions and thread sizes. 2. Checking the oil seal retaining dimension of the outer CV joint - this dimension usually varies among different CV joint models. 3. Verifying the correctness of the internal spline's circlip groove, as the width of the circlip groove affects the axial movement of the CV joint on the driveshaft after installation. 4. Material and heat treatment properties, which require specialized equipment for inspection.