I didn’t mean to get you upset. To quote Clinton, “I feel your pain.” I've had two final drive failures, and a faulty gas flange that caused my leg to get soaked with gasoline.
I’m just trying to figure out the best time to do what BMW will not. Unless someone else has a better idea, I'm going to lube the splines, and check the u-joints when changing the final drive lube.
E.
Not upset just a grouchy old man
I would do it at tire change or rear brake pad change as you are there and have a lot of the work done in removing that stuff.
It really is easy if not rusted tight. If rusted it depends. Mouse Milk is one of the best rust breakers I know of and dose of that or other rust breakers may make it easier.
That is another thing if you know about it it is easy to do, really easy if no rust.
I used a dremel tool with a wire brush on it and some areas by hand to clean it then blew it out with my compressor.