I have a 2006 mega cab, automatic, lock out hubs, 4x4 switch. We got a big snow not long ago and went to use 4 wheel drive and turned the switch. I heard it thump like it went in but tried to move and only the back tires moved. I got out double checked the hubs and tried again. Nothing. Put it in neutral switched to low. Still nothing. It thumps like everything is working right but no power is going to the front. I jacked up the front and locked the hubs in the axle is turning so its not the hubs. If anyone has any ideas it would help alot. Thank you