The answers you get depend on the questions you ask.
I checked the trans axle as you asked and found the following, The 2 GXLs # is 151f AO48 then I checked the STD # 151f AO48 then the troopy # 151f AO23.
I asked Gavin yesterday are the gearbox and transfer the same in the 100 series GXL, STD, 78/79 series and the Prado, his reply was no there all different as I explained yesterday.
After your request yesterday I checked the # and you can see the results,
I then went back to Gavin and asked him what this means,His reply was this.
Given what I'd asked the answer is right they are all different, But looking into it the gearbox on its own is the same and the transfers are all different, the transfer on the GXL is different to the STD this is different to the 78/79 but they are the same.
The transfers separate from the gear box differently, the 100 series separate the same as you suggest and the 78/79 series separate the same as the 75 series and have the same seal problem.
So DOZER please accept my apologies as it seems we were both right and wrong.
The oil leaks into the transfer case and fills it up until it is forced out the breather on top, leaving no oil in the gear box.
when this happened to my truck it was on a dirt road and when he hit the black stuff it was to late.
The hose works it forces the oil back to the gear box.