OK Problem totally fixed.
For R33 GTR
Undo both nippes.
One at the front where gearbox ends and follow the line to one at the rear on the driver side
Got inside car and my friend hoisted the car up.
He got me to start the car and turn it off a few times and this turned on the 4wd pump.
first two car starts the nipples farted like there was no tomorrow!
Had quite a bit of air.
Filled it back up while still bleeding until no more farting occured.
Car is beautiful now. So happy got 4wd back!
Thanks to Ken GTR and MR MIagi!
MOderator can you please archive this thread? Will come in handy!