 Yep, it probably is. So it's binding up, you back up, and the shoes will move one direction and then allow it to free up for a second, but then they heat up and then they'll start to stick. Real common problem on those older Ford rear ends where the axle seals would wear into the axle eventually and then they just start leaking. So you're going to want to pull those axles and inspect them and maybe get new axles or a speedy sleeve on there or something to stop the leak because that's a dropout in that one, right?