4 high seems to be gone, and a quick hub question

[Mike Halfway]

recently i was out wheeling some dunes and and when i engaged my 4wheel, she would only run in four low!!!!!!!this of course isnt that bad,but it is some what troubling.it used to work fine...whats wrong.......also about six months ago i installed new pro comp hevy duty hubs. they work great but last nigt i went to lock them and the pass. side kept turning instead of the normal one click operation, but when you turn it to free it stops , i couldnt tell weather its broke and not locking at all or what....thanks

 

[TPLYNCH]

Try cleaning the shift motor. It's usually Low that doesn't work, but maybe the contacts for Hi are dirty and causing it not to engage. Can't answer your hub question, other than to say try taking it apart and see what's broken.