In addition to the shift lever, make sure the shaft it is mounted to is turning. It is keyed and can slip. (see pic 1)
If that is also turning, Disconnect the linkage and see if it moves further if you do it by hand. Make sure the parking brake on in case you shift it to neutral. If that does nothing, then the transfer case will need removed for inspection internally.
Sep 10, 2020 at 6:30 PM