I have noticed that the inside of the left rear tire on my Case 2090 gets oily. Definitely transmission/hydraulic oil. Laying on my back and looking upward at the left rear side I can see what looks to be a couple factory holes in some in some little hydraulic components - either hydraulics or power shift. I think oil drips once in a while and it gets on the tire. Nothing is broken or cracked, oil must be dripping from one of those holes. I don't know if component would be a pressure relief with a center that screws out??? Using the hydraulics and power shift while planting. Can you identify where the oil is coming from? If so, how do I fix it?? Thanks.