Originally Posted by vwlos
So this would be a stock rear driveshaft? And is it normal for it to be rusty?
Well from the photo yours is clearly a Rubi with the stock setup. It has no need for an SYE as tue tailshaft of the transfer case already has a fixed yoke and the slip joint is on the driveshaft but you might want to look into a CV shaft.
That looks like light surface rust and will not be a problem. If it bothers you remove it, clean off the rust and give it a coat of high heat paint. It is very easy to remove.
As for the gearing 4.88 is what you are looking at for 33" tyres and the 42rle. I still have stock 3.73 gearing with my 32"s and it is perfectly liveable but not ideal.