Photos: Kevin Wilson
The Great Cover Up
One of the keys to keeping a differential alive is keeping it cool. Utilizing synthetic rear end gear oil helps, but nothing beats addition fluid capacity from an aftermarket rear end cover, which replaces the shallow, stamped steel factory unit. Ford Super Duty diesels are notorious for having factory diff covers with blistered paint on them, which indicates things inside are getting pretty hot.
A great looking, and budget-minded alternative to the factory diff cover is a cast aluminum, deep sump cover from PML. Offered in either an as-cast finish, black powder coated or polished, they offer greats looks and added fluid capacity for improved cooling, along with an added fill plug at the top and a drain plug at the bottom to make servicing your differential easy. We opted for this cool looking black powder coated Dana 80 cover from PML when buttoning up Project Box Hauler’s rear end.