TrAnsmission

I was driving it home and lost all gears and put it. In 4 wheel. And got gears. Back and. Know. Its making a whining noise and. Its like its stuck in a lower gear. And its back in. 2 Wheel

so it sounds like a transfer case problem. Like the transfer case went into neutral. but need more info about what happened and more detail on what happened to get gears back in 2wd