Wife's 2016 2.5 outback CV axle replaced. For the life of me I can't get the fill plug off/out. I've tried impact, I e tried breaker bars, I've tried PB blaster, everything but heat due to it being the differential. Anyone else run into this and have a solution. I don't have a lift or access to one, doing it driveway/garage with jack and stands. It's squealing and needs fluid. Please help.