I have a kabota 3240 with 600 hours and for the past few days I have noticed an oil leak at the split pin plug under the clutch housing.While idling, it lost about a 1/8 cup in twenty minutes. Both engine and trans fluid levels are good for now. Researching has shown that it is probably the seal on the trans side. How big a job is that and when they talk about "Splitting" the engine, I don't get the lingo. I'm pretty handy with mechanics and would love to save the bucks if it's just a seal. Are there diagrams for this kind of work? Any suggestions?