Thank you for the reply! I just picked up the mower and deck today. They replaced the gearbox and I got the old gearbox so I could learn from it (they are new territory for me). They said it was leaking oil and such and the bearings were rough. I plan on taking the old gearbox apart in the future so I'm more comfortable. I'm not sure if they checked the oil level, but it was at a Grasshopper dealer/agriculture shop, so I'm hoping I didn't have to
From what I understand, in its upright position, the top hex bolts are the fill holes and full is up to their threads, right?
Do you have a certain amount of hours usage that you think is best to check it?
I think the manual went into some text details on removing the gearbox (take deck off mower, remove guard, take out half shaft, etc.), but I'll have to YouTube around for some visuals to get my confidence up.