Has anyone replaced the seals in one of these gearboxes? It's on a BX2350D. It's not the owners manual gearbox. It's a split aluminum case. Horizontal spline runs via drive shaft. Vertical shaft has blade. I have to replace the lower bearing (very bad, greased but too much play)and seals in the part that bolts to the mower deck. That part of the fix is the easy part. The gearbox internals are fine but leaking lower seal. Lots of silicone. Hate that stuff. The split gearbox is the nightmare. Anyone out there have any rebuild experience or know where I could get a rebuild manual for this gear box. The factory service manual has the alternate gear box breakdown but not for this one. Any help appreciated.