Leaky finals are a common complaint, but not a problem I've had. There's a plug under each steering brake, 1/2" or 3/4" MIP, that you could pull to see if it's dry in there. A buildup of leaked oil there will eventually get your brake bands wet. A 933 I looked at for a friend was missing the plates the plug went into, leaving a roughly 4x6" hole. You remove them to replace the brake bands. Same tractor was missing the belly pan. Seller had them, just didn't want to bother. Take a look at the clutch dipstick, in addition to the other 2. PITA to work on, but simple. The reverser gear is no longer available from Cat. Lowest one in the case. I had one custom made. Pretty sure I'd be changing the tranny oil immediately at look carefully at what came out. Trust me, you don't want a roller bearing trying to slide under that reverser gear. You surprised me with that price, but I've never seen one with 4-in-1, nor rippers. And that trailer is certainly worth a bit, maybe a lot. Good luck.
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