Nut's at the top and bottom of the shaft housing

whats the nut at the top and bottom of the shaft housing looks like oil filer or something scary about the lack of grease

They are the final drive oil filler cap & drain plug

so what is the issue with the greasing of the shaft ive been reading about is the oil and the grease thing two different areas of lubrication but in the same area?

tony from dorset wrote:

is the oil and the grease thing two different areas of lubrication but in the same area?

Yes thats about it, same area but different sections.

The hypoid gears of the shaft drive at the back wheel are in a sealed unit (full of gear oil), but the unit has a cog that meshes with a similar one on the back wheel which needs greasing; also the shaft runs up to the engine and has splines that fit into a universal joint; also needs lube. See excellent file in maintenance section of how to do it!