After almost two months of work my Trooper back to life.
Now it is more Japanese, then it was before. No more 4L30E transmission. Now I have Aisin AW30-40LS from 2004 Rodeo.
Mechanically - easy swap with very simple modification of cooling lines and switch link. Electrically - a lot of work with wiring. More info on planetisuzu.
Pics here: http://picasaweb.google.com/vboyko/TrooperProject#

2001 Trooper LS 3" lift,no more Rancho 9000RX,
no more 4L30E transmission,
ProComp 8" 130W driving lights,
Surco roof rack (modified),
110V power outlet, Viair 380C compressor,
CB/FRS/GPRS/HF/VHF/UHF Radio, 285/75/16 BFG AT/KO.