Walker MTGHS 48 in 125 hrs. 07 model 23hp. A bolt fell out from under the deck that held on the gearbox. I moved the gear box quite a bit struggling to get it back in. i got it in... and oil was everywhere! gear oil was just spilling out! I immediately bought new seals and discovered the old ones were basically gone by rotting?/torn up?/missing? It was unusal to find half a seal, and then a deteriorated one and one was missing. So i replaced them. It STILL leaks. I have put approximately 15 fl oz of gear oil in them total(between the three). Why is it leaking still? (it is the connection between the longer shaft and the RIGHT blade gearbox.