Just the gear box off the np203 is used with an adapter between trany and np205. The rest of the np203 You throw away.
I have no idea how much the adapter would cost
but it is made by O.T.T. Industries.
and gives you a 0.5:1 Overdrive
wich means you might want to keep your axles at 4.11 or evan 4.56.
operating the NP203 transfer case in reverse makes for a hotter running and noisier unit, but with the addition of tapered roller bearings on the idler shaft, Thay say you should have no problems with it.
