Hi, My name is ***** ***** for the delay.
I will do my best to assist you.
from the way you explain the problem,it does sound as if you may have a bad/sticking transfer case actuator motor.it sounds as if it may be weak or the case is stiff.
try this,remove the shift motor and manually shift the transfer case through the gears with a crescent wrench,then re-install the shift motor,also check the transfer case fluid to make sure it is full.
these can get stiff from a lack of use,.if this doesnt fix your problem,i would think it will need a new shift motor,understand it is common to get a bad new shift motor for these,i have had to install 2 or 3 before getting a good one
PLEASE COPY AND PASTE the link below to your browser, I have uploaded more info on this there please copy and paste the link below to your main browser[INTERNET EXPLORER or FIREFOX]
if the link doesn’t work that way, try it this way
If you are satisfied with my answer, Please Rate my answer by clicking the rating button so I can get credit for my work. I’m not always going to be giving you good news, so please don't let this stand in the way of you accepting my answer. .it does not cost you more money and we will still be able to communicate, ,.please understand, i can not see, hear or touch the vehicle and only know what you tell me. Bonuses and positive feedback are appreciated.. if you are not satisfied with my answer, please do not leave bad feed back ,i will gladly opt out and let another expert handle the question. .if i have sent any diagrams, please print them. .sometimes you may need to right click the image [,then save picture as]to save it to your computer so you can open it with your picture program...Please ask if you need more help