What to know about the Universal Joint (U-joint):
In rear wheel-drive cars, a driveshaft is required for the tires to rotate. The driveshaft transfers the power from transmission to the rear tires, allowing them to turn.
U-joints hold the drive shaft in place. If the U-joints are not oiled, the bearings inside the U-joints will wear out over time and the drive shaft will begin to shake, while the car is moving. You will sense vibration in the seat or throughout the car. You may also hearing clunking or banging noise when you put the car in a gear.
Facts to Note:
It is best to substitute all U-joints at the same time, even if only one is damaged.
If the height of your vehicle has been modified, the U-joints are more likely to give out.
How to Fix:
Jack up the back side of the car.
Take away the drive shaft.
Take out and change the U-joints.
A mechanic should grease the U-joints during regular maintenance service. Doing so will significantly improve the life of the U-joints.
SEE ALSO:HOW TO LUBRICATE U-JOINTS
Common symptoms indicating you may need to change the Universal Joint (U-joint):
Vibration sensed in the seat or all over the car.
Abnormal noises coming from under the car.
Red or pink fluid on the ground (transmission fluid is leaking).
Importance of this service:
U-joints are in control for holding the driveshaft in place. Since the driveshaft transfers power from the transmission to the wheels, it gets a lot of force, and it depends on the U-joints to help it stay sturdy and in place. When the U-joints break, the driveshaft has nothing holding it in place, and so it shakes heavily, which not only is detrimental to the driveshaft’s health, but also results in a very bumpy ride.