Universal joint questions

[DARTLARRY]

I know that there are different size cups for U joints. Is there also different length U joints? I mean the distance across the U joint, I am trying to install a new U joint on an 8 3/4 and the cups are 1/4" from the edge of the yoke. This doesn't seem right. Maybe someone here can help me find the right U joint. Thanks

 

[Bad Sport]

A little more info might help. Is the rear and driveshaft original to the car? Rear swapped at some point?

Tell us more.

 

[DARTLARRY]

The rear end is an A body 8 3/4". I just recently replaced the center unit, I don't know what the new center unit came out of. Before I swapped the center unit the U joint fit fine, this different center unit must have a wider yoke. The u joint that I have now doesn't stretch across the yoke. It comes up short on the ends.

 

[69B-Cuda]

yes, there are 2 different size u-joints. do you still have your old center section? You may be able to swap yokes if the splines are the same.....

 

[DARTLARRY]

I got rid of the old center section

 

[Bad Sport]

Or get a combination U joint. It will fit your DS shaft one way and fit the yoke the other way, 2 different lengths.

 

[DARTLARRY]

Where can you get a combination u joint.

 

[krazykuda]

Or get a combination U joint. It will fit your DS shaft one way and fit the yoke the other way, 2 different lengths.

So basically what you are saying is that he needs a universal universal joint.... LOL!

 

[krazykuda]

I got rid of the old center section

Never get rid of your old parts until the car is back up and running again... You never know when you will need them.... :banghead:

 

[krazykuda]

Why not find the other (right) size yoke for the u-joint axle connection and swap it out?

 

[Bad Sport]

Do yourself a favor and do some measuring. Refer to this chart.

 

[DARTLARRY]

thank you for very much for the conversion chart.