Outer Limits 4x4 Board

My girlfriends mums 80 wont shift past 4high. Its a base model 80, 1990 build and its done some k's. Its their farm truck.
It will shift freely from 2High to 4High but the transfer shifter won't lift to go from 4High to Neutral or 4Low.
I have had a similar problem in my sierra and it was just the transfer bush had disintegrated, is this a similar deal? common problem in 80's? or something more sinister?
Cheers.
Rhys.

hey mate check this thread might give you some ideas.

http://www.outerlimits4x4.com/phpBB2/vi ... p?t=130294

Thanks alot.
I had tried searching but am on dial up out here and it is very tedious.
Cheers.

pull the shifter out and give it a good clean and grease and put it back in and it should work properly

i had the same problem with my 80 and just pulled stick out and cleaned and greased it properly. havent had a drama since

thanks guys, I pulled the boot off, gave it a spray, left it over night and it free'd up and feels like new. Thanks.