Question about diff breather mod - why 2 way?

If you can breathe in and out through it, it IS a breather!
See my link for the mod. Part numbers photographed.

 

When I blow it flows fine, but absolutely nothing when I suck in....lol

 

Then it is not a breather.

 

Great. Well I only bought what ppl posted on here was a breather. So do you have a part number for one?

 

I used the part numbers found in the first post of this thread.

https://www.tacomaworld.com/threads/differential-breather-mod-for-dummies-pics.15686/

 

Well I ended up doing what another member did. I took off the diaphragm on the one I got, and drilled holes on the cover thing. And now it breathes both ways

 

I already advised you that my thread on the mod (link in my signature below) has photos of the parts and the bag with number shown.

 

I took care of it.