I bought another L2250 for a steal at a local auction one thing I noticed when I got it home was it seems to be leaking oil from both front wheels on the front differential. I noticed that on my first tractor there is what looks like a 4 inch black plastic breather tube threaded into the one side of the differential and on the one I just bought it is a solid plug. Would this be the issue ? Just a thought as if it is a vent and it's blocked the oil might no elsewhere.