RockCrusher Diff Cover Stupidity Warning | Rubicon Owners ...
Joined Feb 20, 2003. ·. 1,184 Posts. Discussion Starter · #1 · Feb 8, 2007. Just because you CAN put in more fluid with the new diff covers doesn't mean you SHOULD put in more fluid. I finally installed my new covers about a week ago, and filled those puppies up. Took about 2.75 quarts for the rear and about 3 for the front.