If you are blowing oil out of your transmission or rear end vent line, you need a JOES baffled Vent Tank. Equipped with a filter to keep dirt out of your lubricant and  1/4" NPT pipe threads or -8 AN at the bottom for your vent line. JOES Vent Tank available for 1 1/2" or 1 3/4" tube mounting and flat sheet metal mounting.