I found a leak from my front differential vent line plug. It was hard to see the leak but the top of my skid plate had a coat of fluid on it. When I parked on an incline, it would leave a drop of tan fluid on the ground. It is a plastic piece on the left, top side of the differential. It appeared to be screwed in and was just not tight. I gave it a few turns and now seems to be okay. Anyone else seen this? I haven't seen any posts on this.