2002 Yamaha V Star Classic "oil leaking back wheel hub" Questions

...oil (or you have a leaking seal). Definitely check that you have hypoid gear oil in your final drive so you do not destroy a $1000 assembly. If your final drive has no oil and it pours out as fast as ...

...oil coming from a cylindrical "thing" located at the top of the rear wheel drive gear box/hub. I'm not sure what it is called or what it actually is. Can I fix the leak? How? Anything can be fixed. ...