View Full Version : u-joints
05-07-2004, 02:24 PM
How do I know when u-joints go bad? I have the kind that do not have grease fittings so I can't lube them.....how long should they last and how do I know when to replace them?
05-07-2004, 03:13 PM
Put each hand on each side of the u joint and yank them around looking for large anounts of play. You can usually tell a u joint is bad because of a clunk when you step on the gas or when slowing down. Sometimes there will be vibrations when cruising.
05-07-2004, 03:36 PM
Also, when moving at very low speeds, you may hear a squeek-squawk (high-low) type of sound. As you speed up, the sound will go away. That is usually u-joints.
05-07-2004, 08:44 PM
s q e e k , s q u a w k , s q e e k , s q u a w k , s q u e e k , s q u a w k , sqeek , squawk,sqweek,squawk, ect.
Gets faster with speed, louder with high loads at low speed, and (usually) disappears at higher speeds.
Also the cluncking from drive to revers is a good sign.
05-08-2004, 02:12 PM
A vibration is also a clue to a bad u joint...
05-09-2004, 12:52 AM
The driveshaft is turning so fast that it will indeed cause a vibration at certain speeds. I have had vehicles only vibrate at say like 51 MPH but stop at 52 or not vibrate at all at 50.
05-10-2004, 01:23 PM
When replacing them, remember to replace ALL of them. It just makes sense.
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