No. They just mark their territory.**** me its a land rover..
They leak.
Just keep topping it up.
If it is the O ring of the intermediate shaft then you have to at least pull the tbox a bit away from the gearbox (as far as I remember). For this you have to remove a lot of things already, so maybe better to remove the Tbox and do it on a bench. You have to remove the shaft and change both O rings as one is on the shaft and one is in the housing. It is very difficult to do it while the box is still hanging under the car. Also you can check the shaft hole if it gets oval than even new oring will not help. In my case I had to change the case for a sleeved one.I checked t-box and its breather today. I pulled down the breather and felt it all way to the bolt, it is hard semi-flexible, not like melting, but some oily around the bolt. I also found it is wet around a bolt-like rusty round, a bit concave at its centre (i-shaft?). This is at the front paView attachment 189688 rt of T-box. At its back part it is still dry. If it is i-shaft o-ring, is it possible doable by DIY without remove T-box. Please see pic.