Prop shaft syncing

Question, do the front and rear props have to be in sync at the transfer box? i.e. Both yokes on the same horizontal/vertical plain? Obviously I know they need to be on the same shaft. Have changed rear UJs with no change.

I have a strange juddering that picks up in hi rev 4th gear and low rev 5th...

Thanks

no it doesnt matter ,just the shaft it self

Is there a way of re aligning the sliding uj shaft bit and the rest if the prop.. Trouble is, there is no arrow or other markings I dOnt think!

put the two inner yokes directly connected to shaft in same alignment ,if on front only it feels wrong move round one spline

Ta!