Universal joints allow travel shafts to move along with the suspension as the shaft is definitely moving so power can be transmitted when the travel shaft isn’t in a straight line between the transmission and travel wheels.

Rear-wheel-drive vehicles possess universal joints (or U-joints) at both ends of the drive shaft. U-joints hook up to yokes that as well allow drive shafts to go fore and aft as cars go over bumps or dips in the street, which effectively shortens or lengthens the shaft.

Front-drive vehicles also make use of two joints, called continuous velocity (or CV) joints, nonetheless they are a different kind that also compensate for steering adjustments.

On rear-travel vehicles, one sign of a worn U-join is a “clank” sound whenever a drive equipment is engaged. On front-drive cars, CV joints sometimes make a clicking noise when they’re donned. CV joints are covered by U Joint protective rubber boot footwear, and if the boot footwear crack or are normally broken, the CV joints will lose their lubrication and be ruined by dirt and dampness.
A U-joint is situated in both front wheel drive and rear wheel travel cars. Although they will vary in design, they possess the same reason for giving the drive train some flexibility. This is necessary as all vehicles flex while in action.

U-joints are found on each of the ends of the rear travel shaft, whereas CV-joints are located on front wheel drive cars. Each allows the drive shaft to rotate as the differential movements in relation to the others of drive train mounted on the chassis.

The U-joint functions to save wear and tear on your vehicle’s transmission. Inability to get a universal joint substitute done when needed can lead to substantial harm to your vehicle in the future.
There are some indicators that U-joint or CV-joint is failing. They include: