I just found out Toyota made a “Mega” Coaster.
Looks like an ordinary “Minibus” coaster, but it has the same engine, transmission and, critically, 4wd system as this
Same 15B-FTE Intercooled 4.1liter 4 cylinder diesel, same portal axles (at least in front) and everything. I think it uses a different, non-portal rear axle instead of fully independent with portal but still. So strange and cool.
I can’t find good images of these axles online but I’ve seen them in person (on a megacruiser) and they look like this
yup, inboard discs too.