Hi- Is the shifter real loose?
The vehicle operator may experience a condition where the transfer case can not be shifted into high or low range.
This condition may have resulted from an incorrect shift procedure, where a low range transfer case shift is attempted when the vehicle is not in motion (a static shift). The incorrect shift, into or out of low range, may force the transfer case lower shifter lever grommet to come loose from the transfer case shifter.
Inspect the transfer case shifter linkage. If the trunnion has come loose from the grommet in the transfer case lower shifter lever, then perform the Repair Procedure.
Hope this helps.