Hi Baz..Yes I've opened one up to suss it out. There is 2 bearings in the middle & 2 in the tail section to suport the 2 split shafts.
The collar that moves forward & back to run either fwd or awd is from memory 22mm long & overlaps 10mm on each shaft in awd.
The collar has an internal spline & the shafts have external splines. The collar has outer shoulders that the selector fork lives between.
In fwd mode there is No shafts being used. The drive is straight from the hemisphere & would handle what the hemi can take.
I have sheared off the shaft at the crown wheel end of my viscous lsd where the bearing is pressed on.
So far Baz, my switchable transfer case has done the job. I can't say they are unbreakable. I have read they are weak. I say bullsh_t.
Cheers !
