OK all are fixed now, turned out to be the rocker cover gasket at the rear, replaced the gasket AND shortened the collets that sit inside the rubber grommets that the bolts go through the bolt the cover down, over time the rubber compresses and you run out of thread, so they need a mm OR 2 of the collet to get more down pressure.
Turbo drain pipe leak was the top gasket, 10min in the oven and some silicon gasket the blue heat resistant stuff and it's all good, new pinion seal gasket on the transfer case and no more leaks

Baz.