I thought I read somewhere that the rear diff seal is reusable but can't seem to find that information anywhere now. I will be changing the oil some time this week and don't realy want to play with the brake lines attatched to the top of the diff. Hate playing with brake lines. I was just going to remove all the lower bolts and loosen the top ones to remove oil then reinstall if the seal is reusable. Pulling back on the brake lines to remove cover is not something I want to do. I always seem to crack brake lines when I play with them.