If there is no air going to the differentials front and rear would that cause the hubs not to turn at all. I was sitting at a red light and heard a pop and my jeep wouldn't move. I thought I spin a hub so I locked in my front axle and put the front on high (I got the twin stick so front and rear can be in high or low seperatly) the front shaft turns but still the front wheels wont. Could this be caused by no air to the diffs. My arb compressor is not giving any air to the pumpkins