Originally Posted by BDawg171

1977 F250 4x4 Dana 60 rear end. The left side where the rubber brake hose fastens to the axle. You have the rubber brake hose that has the brass block where it fastens to the axle. There is a threaded piece that slides through the block and threads into the axel housing.

This threaded piece is obviously a breather vent for the axle as it has a nipple on it and there was a vent hose attached to it. I took mine out as it was full of crud.

I cleaned it out, yet I dont see how this piece actually vents. I cant get any air to pass through it. Even with 150psi. It is not a through hole in the piece. I dont understand how the air is supposed to pass through it.