On my truck, not tractor. 2016 F-350 DRW. Attached to rear axle, appears to be a vent. There’s a clip that looks like it should attach somewhere, and a fitting on the end. Anyone?
Usually they're fastened to the body above where it would suck in water if the diff gets submerged, looks like your's goes into a filter possibly to prevent dust being drawn in? I'm thinking that clip goes on a lip of a seam somewhere.............Mike