Can a greasable U-Joint showing stiffness be "saved" by greasing

Question

I recently pulled the driveshaft off my 1986 Dodge B250 van, expecting to replace one or both universal joints.  I was surprised to see they both have zerks, so can be serviced (sure wish I'd noticed sooner).
The rear U-joint moves freely in all directions and seems fine, the front joint only moves freely in one direction, the other axis has definite resistance, but can still be moved by hand.
There is no play or looseness, just stiffness on one axis.
My general understanding is that if a U-joint is showing signs of wear, like not moving freely, it should be replaced. However, if I grease this joint and it begins to move freely, is it considered it still good?

jwh20 · Accepted Answer

In a word: NO
By the time there is looseness or roughness the damage is already done.  The only thing left is eventual failure of the joint.  As long as you are prepared to deal with that happening at the most inconvenient time (think late at night, it's raining, you're running late, etc.) then by all means, grease it and keep driving.
If that's not OK with you, then you should replace it as soon as possible.

Solar Mike · Answer

My 4x4 had 4 of those uj's and I used to grease them weekly and always after they were immersed in water.
They lasted a lot longer than if I practiced "fit & Forget"...
However, I was also skilled at using the tow bar and a hydraulic jack for changing them.
Any roughness then replace is my advice.

Can a greasable U-Joint showing stiffness be "saved" by greasing

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