We need more info:
Did you replace the clutch?
Were you replacing a bad transmission?
How did it go back together, easy and simply bolt it together, or did you have to force it together with the bell housing bolts?
Can you put the transfer case in neutral(point between HI/LO 4wd), and turn the front drive line?
Have you removed the transmission, to see if it will shift with it out again?
