90-96 q45 diff
z32 tt/90-96 q hubs
1 driver's side axle from a q(90-96) installed on the passenger side of your car
one driver's side axle from a z32tt installed on the driver' side of your car
a drive shaft with the right flange on it for the q diff
Mix together thoroughly, then have fun.
Info found here:
http://www.ka24development.com/vlsd.html