Hey all, new to the community and have been searching the forums but can’t find my exact problem. So I hear some grinding going on, I thought brakes, but no they’re fine. Take it to a local shop, they say I need to replace the rear differential. I ask them if there is any shavings in the fluid and they bring me in the garage to see. When the filler plug is popped the fluid spurts out, then drips and no shavings or debris. I asked them to replace the plug and put some more fluid in. On the way home, no problems till about 5 minutes away (15 minutes from home) it starts grinding again. I am thinking it is just a seal problem (85k miles). I am an amateur when it comes to vehicles, basic maintenance brakes, oil, cooling system, filters, etc. This is above my knowledge but I do not believe I need a new differential. Any help is appreciated. Thanks.