Strange. My '08 will disconnect in 4 hi and lo.

 

My '10 disconnect in both high and low. I'm guessing if yours does not, then you have a problem.

 

Yeah when I got it from the stealership the salesmen said you can only use the disconnects in 4low... I've tried in 4high but the light just flashes. I just want to be able to hit a button and use it anytime I want basically. I probably wont be using it in 2wd in an off camber situation. Just want to have the option as stated before.

 

You may have caught it when it had a torque load on it.