Hello all. I broke down and bought a Cat 933f serial number 42A4399. I was told the final drive is out but haven't got that deep into it yet.  The engine starts fine and idles perfect. The issue that I'm having is the machine won't pull itself. I'm pulling the top plate tomorrow and wondering what to look for. I have a service manual ordered, but I patience isn't my middle name. Any input will definitely be appreciated.  Thanks