Drive Shaft's Rear U-Joint Installed Incorrectly?

[OG-TERROR]

The rear u-joint is installed wrong.
Watch which way the driveshaft pulls on the u-joint when traveling forward. The grease fitting hole will be pulled apart and not compressed. The fitting hole is the weakest point of the u-joint cross, you want that point under a compression load. To be correct and at its strongest, that u-joint should be installed 90* from the way it is now.

What do you guys think

 

[Bigredmariner]

Well right now what I think is, if you turn it 90 degrees it ain't gonna fit.

 

[Zembonez]

That's the craziest theory I have ever heard. No matter WHERE the Ujoint is installed in the yoke, it will be under the same amount of stress.

BUT WAIT!

 

[dietz4ibanez]

It does seem as if some adjustment needs to be made with the pinion angle. I could be wrong but it would he a slight adjustment..

That actually looks healthier to me than ole blackey...

 

[Bigredmariner]

OK I have never heard of this before and had to google it. Look at this stuff Leo, Link.

From what I read, yes, I think he means the u-joint should be moved, 90 deg, counter clockwise. Some of you guys go read that and see what you think.

 

[Bigredmariner]

90 degrees either way would do it actually.

Learn something new everyday.

 

[Carneyman]

OK I have never heard of this before and had to google it. Look at this stuff Leo, Link.

From what I read, yes, I think he means the u-joint should be moved, 90 deg, counter clockwise. Some of you guys go read that and see what you think.

I agree. Stress around that hole is extremely high compared to the rest of the joint. It probably won't fail (from normal use) in either orientation, but it would be a lot less likely to fail if you did rotate it.

 

[dietz4ibanez]

Are you experiencing abnormal vibrations?

 

[Zembonez]

OK. Position explained. I believe now!

 

[Carneyman]

OK. Position explained. I believe now!

Actually, I think he means changing which yolk is on the drive shave and which is connected to the diff. In compression holes are under a lot less stress than in tension, so by rotating it, the driveshaft will be pushing on the hole instead of pulling on it.