If your transfer case broken you would not have park. Do you get anything in commanded gears 1 or 2? Either way you are looking at a rebuild, but it would help narrow down the problem.
Read here:
30 common transmission problemsFrom what you describe it sounds like these can be your potential problems.
19. Loud bang, grinding sound, loss of all gears, and a binding driveshaft: Snapped output shaft. Try to wiggle driveshaft - if more than 0.020" play, that's the sign. Must be removed and transmission rebuilt.
21. No movement in any gear: pump failure, or total loss of fluid. Remove transmission and rebuild, or refill pan and find the leak. If out of fluid, avoid running the engine until the transmission is refilled to avoid pump damage. To check for pump failure, check fluid level with the engine off, then start the engine and recheck fluid level. If level does not go down when engine is running, the pump is broken.