Outer Limits 4x4 Board

I've got a BAD shudder in my drive line at low speed. 95 dual cab hilux 3l deisel. Just started 2 weeks ago. Found rear diff pinion smashed - replaced, replaced centre bearing. Still shudder. Disconnect rear drive shaft and drive on front shaft - FINE.
Shudders that bad that the new centre bearing rubber pops out of the casing a bit.
Jacked it up with a fork lift and ran it in gear. FUCK ME - what a shudder, even not under a load it does it. You can see the transfere moving around.

Engine / gearbox mounts????
Gearbox????
Transfere output????

PLEASE SEND SOME IDEAS - GOT ME STUFFED

did you pull the tail shaft out in one piece or split in 2 ?

if you split in 2 did u mark it and fit it back the same way ?

uni joints ok

what about the spline in the slip joint is it badly worn ?

Must have everybody stumped hey?
Dont worry, found the problem.
Input Bearing loose in gearbox housing.

How come it ran OK in Front Wheel Drive then??