Half Shafts Poblem

[jondee86]

Interesting problem If I understand correctly, the axle spline has tried
to turn inside the side gear spline, but didn't quite make it. So now the
splines are jammed together with only the peaks touching.

If this is correct it indicates that either the wrong axle was installed at
some stage (zenki axle into kouki diff) or the car has done 500,000 km
and the splines just wore down.

As you suggest, it may be possible to "shock" the axle free by turning it
in the reverse direction. The diff will have a bit of restance to accelerating
suddenly even without being connected to everything else. So you could
try wedging a strong piece of hard wood (say 50 x 50 x 400 long) between
the wheel studs. Then give the free end a decent whack with a heavy
hammer. Technically, this is known as the Caveman approach

Cheers... jondee86