The cab reaks of gear oil. I cant see a leak anywhere and there is nothing on the ground or leaking around the hubs. It is nauseating in there. I suspect it might be the vent tube. Now I just need to find out where it is. How would one go about clearing that? ANyone else ever had this problem?

 

The vent tube is under the factory airbox.
My bet is the smell is combination of the rear hood seal being off and an overfilled differential. Factory spec is 3/4" below the bottom of the fill plug.

 

I had the same thing about a week after I had checked the differential fluids. Took a couple of days of cleaning and checking for leaks before found the bottle of fluid I put behind the seat. Seems when the bottle turns on its side and the lid comes off, it will leak. At least it was only in the organization tray and not all over the carpet. Also the weather was nice so I could leave the windows open to let the ruck air out over a couple of days.

 

maybe thats the problem (being overfull.) I did notice a little bit of wetness near the ujoints on the ends of the axle. I think i will take the fill cap out and blow a little compressed air through the vent tube and see if that helps.