I'm thinking of upgrading my stock differential covers to the Solid Axle Industries ones. I have a couple questions...I have searched this forum, but really haven't found a definite answer. I don't have a lift on my 2010 Sport. Will the front differential cover have issues fitting, will it rub on some of the suspension components? I also know that these covers have a higher fill hole, so you can't use that whole as a measure on when to stop filling. Might be a dumb question, but can't I just convert the amount of oil in quarts from the manual, into cups and pour the oil into a measuring cup in order to get a perfect amount of oil to ensure that I don't over or under fill?