yes
Np231
NP245 or NP247 use a special transfer case lube NP231 or NP242 use Automatic transmission fluid
It is on the center of the rear of the transfer case.
about $1000
diagram from front vacuum motor to transfer case of 1993 Jeep Wrangler
The transfer case takes atf, use dextron.
Yes. transmission in Park, transfer case in neutral.
Np 231
About 1.5 quarts
yes
they might be different on some models but they would be interchangeable either way.
Jeep recommends 2 Quarts of ATF+3 (Or ATF+4) Fluid in the NP231 Transfer Case that comes on your Jeep Vehicle. Use of any other fluids may cause problems and will void your warranty.