Lying on my back underneath the engine & looking up, I can see a halfshaft sticking out of the gearbox, which goes across from the passenger side toward the drivers side. It travels across the back of the engine block, low down near the sump, and goes into an aluminium-looking bearing housing not all that far off the centreline of the vehicle. On the other side, I guess the shaft carries on into the drivers side front wheel.
In the vicinity of this aluminium-looking bearing housing, maybe a bit over toward the driver side, there is a load of steel plate chassis memberism, more or less the mirror image of similar chassis members over on the passenger side.
Now.. the aluminium-looking bearing housing thingy and the steel plate chassis memberism it's near, and in fact a lot of the sump on that side, is full of dripping engine oil.
The backside of the engine block is full of grime and black oil too.
I've cleaned all the muck off today with gunk, spray cleaner and a powerwasher and am waiting to see if any fresh dribbles of oil can identify the source of the leak over the next few days.
I wondered if anybody's been here before & can suggest likely sources for a leak.
Hit the nail on the head & I'll send you a genuine faux pearl ring