How to unstick four wheel drive I use your transmission gear shift motor 99 ford explorer?

How to unstick four wheel drive I use your transmission gear shift motor 99 ford explorer?

Older 4x4 systems that use a belted transfer case as is probably in use in a 99 explorer might get mechanically bound and get stuck either in 2wd or 4wd if there's too much mechanical pressure on the system.
try sticking the car into neutral and letting it rock back and forth a bit to ease up some of that mechanical pressure keeping the transfer case locked up. If this does not resolve then try going into reverse, backing up a tiny bit, then trying again in neural. If this does not resolve the problem, you may have problems with your transfer case, or the control module.
this could be a costly repair based on the availability of parts in your area.