817 Jumps out of low range

[cbvet]

A buddy has an M817 that jumps out of low range. A mechanic suggested "it has a bent fork", causing the problem.
What do you guys think the problem is?
What steps would you take to fix it?
Suggestions are appreciated.

 

[jcappeljr]

It could be that the transfer case linkage needs adjusted.

 

[NDT]

Unpin the external shift linkage and make sure the shift rail is in the internal detent for low range when the lever is in the low position. If that checks out, your buddy is faced with the miserable task of pulling the transfer and cracking it open for some explorative surgery. Bent fork is a possibility.