T-case will shift into 4 low but not 4 high
 

1990 Ford f-150 I6-auto tranny- manual shifting transfer case.......


it will shift into 4 low but wont engage 4 high just acts like it is in 2wd


I dont know much about them so I dont know if there is a simple thing that could be wrong or if the t-case is probably shot...any advice is appreciated

It's hard to guess, given so little info about the truck. Click this, read the caption, & fill in your signature:

https://www.supermotors.net/getfile/...oorsticker.jpg
(phone app link)

Read this one, and follow the relevant links:

https://www.supermotors.net/getfile/...56manshift.jpg
(phone app link)

Put the type of hub lock in your signature, too. Do you maintain them? How long since it worked?

https://www.supermotors.net/getfile/...block5scrx.jpg
(phone app link)