Been a long time between drinks for me on the forum, and before I get too much stick, yes I am still alive

In fact I have still got the Isuzu Bighorn I had when I started with the Offroad Express forum

I now also have a 1968 x Army Landy, and a 1986 109 stage 1 V8 Landrover which are both under restoration at the moment.

My question is about a fellow NZ Army Landrover addict, who is having a drive issue with one of his.
There is no drive getting to the rear driveshaft?
I have jacked it up, and when in gear, the front driveshaft is turning, but not the rear.
It is still drivable with diff lock engaged, but I just need to narrow down if it's transfer case I need to be pulling out to sort out, or if there is anything else to consider/test first.
I started with rear axles, and both are fine, along with the drive hubs, so i suspect it is transfer case, but just want to know if there are any other here who have struck the same issue, before I drop the box out of it.