I have a 970 case with a gear shift. When plowing my clutch will slip in second gear if I am plowing in tough clay. The clutch was new 2 years ago. When warm, oil will drip out of the small hole under the tractor. We put a small light with a camera in the hole. The oil was coming from around the range drive shaft.So my neighbor split the tractor. The clutch had oil on it. He took the range shaft out and put a dial indicatore on it. It was good. He put a new oil seal on. Also a new Oring. The bearing seemed ok. Put it back together and it still leaked oil when warm. Does anyone have an idea what the problem is. THANKS