Oil leak under the M38

[Wpns 421]

I recently got a M38A2, we drove it on hard surfaces only and now we have an oil leak coming from somewhere underneath the jeep. We have removed the skid plate and still can't locate the leak. The oil that is leaking is clean/clear, it seems to originate around the transfer case but we can't locate the exact leak point. Could the leak be coming from the driveshaft area?? Transfer case?? Transmission??
The leak is quite big because the puddle gets quite big. The jeep has not moved recently because it is on jack stands. Can someone tell me where to look. If you know M38s and have some free time on a Saturday I would gladly pay expenses etc to help locate the problem.
I really get frustrated when I can't find leaks and my patience levels diminishes every time I walk by the jeep.. I have 7 other trucks ranging from CUCVs to 5 tons and none of them leak but this damn jeep does. HELP PLEASE. Gilles