my guess is the transfercase. have a friend put it in 2hi/4hi in gear and press the gas, see if the shafts are spinning. the grinding i think would likely be a gearset in the transfercase engaging uncooperatively.
my guess is the transfercase. have a friend put it in 2hi/4hi in gear and press the gas, see if the shafts are spinning. the grinding i think would likely be a gearset in the transfercase engaging uncooperatively.