What to know about lubricating the U-joints:
U-joints, or universal joints, are situated along the driveshaft or driveshafts of a vehicle, at any point where the driveshaft has to change angle or attach to another element such as a differential. This type of coupling is able of withstanding huge amounts of torque. Proper lubrication ensures that these parts don’t experience any excess friction and won’t wear out prematurely.
Facts to Note:
If the U-joints show symptoms of excess friction, they should be thoroughly examined to make sure they don’t have to be changed.
These parts are under very high stress. Any issue with a U-joint should be addressed straightaway.
By the time there are noticeable signs that the joints are bad, parts might already be damaged to the point of needing replacement.
SEE ALSO:HOW TO LUBRICATE BALL JOINTS
How to Fix:
The vehicle is raised and braced on jack stands
The U-joints on all drive shafts and steering shaft are located
The Zerk grease fittings on the U-joints are sited
New grease is thrust into the grease fittings with a grease gun
The vehicle is lowered off of the jack stands
Consult the vehicle’s manual for any manufacturer proposals as to how often the U-joints along the drivetrain need to be checked. Each time they are examined, they should be lubricated. While the mechanic is underneath the vehicle, they should also study the driveshaft and other parts of the drivetrains to make sure that any symptoms of a U-joint issue weren’t actually caused by something else. For example, vibrations could be caused by an unbalanced wheel or spoiled tire.
Common symptoms indicating you need to lubricate the U-joints:
Clicking noise coming from under the vehicle when in gear
Vibrations in the vehicle
Importance of this service:
This service is exceptionally essential if the vehicle is showing any signs that the driveshaft or U-joint is not functioning suitably. These parts are under a massive amount of torque and the failure of a spinning shaft is very unpredictable.