Morris,
All and all the Superformance designed catch can is a poorly designed bandaid for an incorrectly installed differential breather location. It’s as if they were trying to create an Accusump without the pressure behind it to keep the
oil in the differential with the catch can and placement. Once the lubricating
oil leaves the differential the damage is done. If everything is working correctly the only thing in the vent hose and catch can will be vapors, nothing more.