Can't get mt diflock leaver to move over and engage, no problem mving from low ratio - n- high ratio and back, but wont move over to dif lock?

 

Sounds like it hasn't been used for awhile and needs to have the linkage cleaned and lubricated. Should be able to get to it from underneight with a hose and then get some penetrating oil on it.
Don't try and force the shifter or you could bend some of the linkage which is not very strong anyway.
If this doesn't work, get back to me, we will try paln "B".
Mike