Axle Vent

do this leave the bolt holding the brass brake fitting in place -- move over a couple inches and drill and tap a hole for the 7/16 -20 thread -- go to the junk yard and take a wobble cap vent off any 8.8 in the yard ( 9/16 wrench needed to remove vent from housing ) -- when you drill the hole and tap it , place grease on the flutes of the drill and tap it will hold the metal shavings from falling into the housing