My 1987 k5 slips quietly out of 4 hi and 4 lo so I assume its the shift linkage I've read my manual but still scratching head over the instructions. Any and all help, tips, and tricks would be helpful

 

What do you have for a transfer case? It should be the NP208, but you never know with older vehicles.

 

Oh yah sorry it is just the same ol np 208

 

On the NP208 linkage, there is a threaded portion of the linkage that has a nut on either side of a post type fitting that will attach to the linkage. Basically, you make sure that the adjustment is such that there is no binding between the shifter in the floor and the arm on the transfer case. I do this by disconnecting the shift linkage at the transfer case and adjusting the linkage so that it slips nicely into the hole on the arm on the transfer case. It should do this in all positions.