Detent in driveshaft normal?

[youngmanvr4]

I took off my auto driveshaft for the manual swap and the back (longer peice) of the driveshaft has some detent in it. Is that normal for it to detent like that? Btw, I'm talking about where the driveshaft mounts to the diff. at the joint. I have a s13 too just to let you know.

Pic of rear driveshaft.


If you dont know, the piece circled is made to move (duh). But my question is should there be detent in it?

The meaning of detent is "A mechanism that temporarily keeps one part in a certain position relative to another, and can be released by applying force to one of the parts."

Or "A catch or lever that locks the movement of one part of a mechanism."

So in other words whats happening is the piece that is circled (where you see the two hole...that piece) move put when you move it like its made to do there is a mechanism that sorta locks it. But if you keep on applying just a little force it moves? Does this make sence? Is that detent normally there?

I've posted this on 3 different 240 forums and no awnser yet. Can anyone here help?